Day: November 23, 2021

An article Regioselective Halogenation of 2H-Chromenones Promoted by Oxone and NaX: A Facile Approach for the Preparation of Halochromenones and 2H-Chromenone Natural Products WOS:000553965400063 published article about ONE-POT SYNTHESIS; ANTIMYCOBACTERIAL ACTIVITY; SELECTIVE HALOGENATION; CARBONYL-COMPOUNDS; METHYL KETONES; VISIBLE-LIGHT; EFFICIENT; DERIVATIVES; CHLORINATION; COUMARINS in [Vanammoole, Lakshmireddy; Kommera, Rajkumar; Kurma, Siva Hariprasad; Bhimapaka, China Raju] CSIR, Dept Organ Synth & Proc Chem, Indian Inst Chem Technol, Hyderabad 500007, India; [Vaidya, Jayathirtha Rao] CSIR, Fluoro Agrochem, Indian Inst Chem Technol, Hyderabad 500007, India; [Vanammoole, Lakshmireddy; Kommera, Rajkumar; Kurma, Siva Hariprasad; Vaidya, Jayathirtha Rao; Bhimapaka, China Raju] AcSIR Postal Staff Coll Area, Sect 19, Ghaziabad 201002, Uttar Pradesh, India in 2020.0, Cited 77.0. Safety of m-Methoxyphenol. The Name is m-Methoxyphenol. Through research, I have a further understanding and discovery of 150-19-6

A systematic study has been conducted for the regioselective halogenation of 2H-chromenones to prepare 3-halo-2H-chromenones, 4-substituted 3-halo-2H-chromenones and 3-(2-haloacetyl)-2H-chromenones. Commercially available NaCl/NaBr has been used as halogen source and oxone as an oxidant to produce the compounds. Further, the method has been successfully applied for the preparation of pharmaceutically important halogenated 2H-chromenone natural products. The present approach is simple, economically viable and provided the target compounds with good yields.

Safety of m-Methoxyphenol. About m-Methoxyphenol, If you have any questions, you can contact Vanammoole, L; Kommera, R; Kurma, SH; Vaidya, JR; Bhimapaka, CR or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Kasper, MA; Glanz, M; Oder, A; Schmieder, P; von Kries, JP; Hackenberger, CPR in [Kasper, Marc-Andre; Glanz, Maria; Oder, Andreas; Schmieder, Peter; von Kries, Jens P.; Hackenberger, Christian P. R.] Leibniz Forschungsinst Mol Pharmakol FMP, Chem Biol Dept, Robert Rossle Str 10, D-13125 Berlin, Germany; [Kasper, Marc-Andre; Glanz, Maria; Hackenberger, Christian P. R.] Humboldt Univ, Dept Chem, Brook Taylor Str 2, D-12489 Berlin, Germany published Vinylphosphonites for Staudinger-induced chemoselective peptide cyclization and functionalization in 2019.0, Cited 50.0. Formula: C7H8O. The Name is Benzyl Alcohol. Through research, I have a further understanding and discovery of 100-51-6.

In this paper, we introduce vinylphosphonites for chemoselective Staudinger-phosphonite reactions (SPhR) with azides to form vinylphosphonamidates for the subsequent modification of cysteine residues in peptides and proteins. An electron-rich alkene is turned into an electron-deficient vinylphosphonamidate, thereby inducing electrophilic reactivity for a following thiol addition. We show that by varying the phosphonamidate ester substituent we can fine-tune the reactivity of the thiol addition and even control the functional properties of the final conjugate. Furthermore, we observed a drastic increase in thiol addition efficiency when the SPhR is carried out in the presence of a thiol substrate in a one-pot reaction. Hence, we utilize vinylphosphonites for the chemoselective intramolecular cyclization of peptides carrying an azide-containing amino acid and a cysteine in high yields. Our concept was demonstrated for the stapling of a cell-permeable peptidic inhibitor for protein-protein interaction (PPI) between BCL9 and beta-catenin, which is known to create a transcription factor complex playing a role in embryonic development and cancer origin, and for macrocyclization of cell-penetrating peptides (CPPs) to enhance the cellular uptake of proteins.

Formula: C7H8O. Bye, fridends, I hope you can learn more about C7H8O, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Category: indole-building-block. Recently I am researching about ATTENUATION COEFFICIENTS; RECONSTRUCTION; MICROSCOPY, Saw an article supported by the National Research Foundation of Korea (NRF) of the Korea government (MSIP) [2017R1A2B2009566, 2018M3C7A1056887]; UNIST (Ulsan National Institute of Science and Technology) [1.180042.01]. Published in NATURE PUBLISHING GROUP in LONDON ,Authors: Baek, K; Jung, S; Lee, J; Min, E; Jung, W; Cho, H. The CAS is 100-51-6. Through research, I have a further understanding and discovery of Benzyl Alcohol

Tissue clearing has gained attention as a pioneering research tool for imaging of large tissue samples. This technique improves light transmission by reducing light scattering within tissues, either by removing lipids or by replacing water with a high refractive index solution. Although various clearing techniques have been developed, quantitative assessments on clearing efficacy depending on tissue properties are rare. In this study, we developed the quantitative mapping of regional clearing efficacy using mean free path in optical coherence tomography (OCT) and proton density in magnetic resonance imaging (MRI), and demonstrated its feasibility in the brain sample with four representative clearing techniques (benzyl alcohol and benzyl benzoate [BABB], Clear(T), Scale, and passive CLARITY technique [PACT]). BABB (solvent-based clearing), involving both refractive index matching and lipid removal, exhibited best optical clearing performance with the highest proton density reduction both in gray and white matter. Lipid-removing techniques such as Scale (aqueous hyperhydration) and PACT (hydrogel embedding) showed higher clearing efficiency in white matter than gray matter in accordance with larger proton density increase in white matter. For Clear(T) (aqueous-based simple immersion), we observed lowest clearing efficiency in the white matter as well as poor lipid removal reflected in low proton density reduction. Our results showed the feasibility of the regional mapping of clearing efficacy and correlating optical transparency and proton density changes using OCT and MRI from existing tissue clearing techniques. This novel quantitative mapping of clearing efficacy depending on tissue types and clearing methods may be helpful in the development of optimized clearing methods for different biological samples.

Category: indole-building-block. About Benzyl Alcohol, If you have any questions, you can contact Baek, K; Jung, S; Lee, J; Min, E; Jung, W; Cho, H or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Name: 4-Hydroxyquinolin-2(1H)-one. Aly, AA; El-Sheref, EM; Bakheet, MEM; Mourad, MAE; Brase, S; Ibrahim, MAA; Nieger, M; Garvalov, BK; Dalby, KN; Kaoud, TS in [Aly, Ashraf A.; El-Sheref, Essmat M.; Bakheet, Momtaz E. M.; Ibrahim, Mahmoud A. A.] Menia Univ, Fac Sci, Chem Dept, El Minia 61519, Egypt; [Mourad, Mai A. E.] Port Said Univ, Med Chem Dept, Fac Pharm, Port Said 42526, Egypt; [Kaoud, Tamer S.] Menia Univ, Fac Pharm, Dept Med Chem, El Minia 61519, Egypt; [Brase, Stefan] Karlsruhe Inst Technol, Inst Toxikol & Genet, Hermann von Helmholts Pl 1,Campus Nord, D-76344 Eggenstein Leopoldsha, Germany; [Brase, Stefan] Inst Toxikol & Genet, Hermann von Helmholts Pl 1,Campus Nord, D-76344 Eggenstein Leopoldsha, Germany; [Nieger, Martin] Univ Helsinki, Dept Chem, POB 55, Helsinki 00014, Finland; [Garvalov, Boyan K.] Mannhe Univ Heidelberg, Ctr Biomed & Med Technol Mannheim, Med Fac, D-68167 Mannheim, Germany; [Dalby, Kevin N.; Kaoud, Tamer S.] Univ Texas Austin, Div Chem Biol & Med Chem, Austin, TX 78712 USA published Design, synthesis and biological evaluation of fused naphthofuro[3,2-c]quinoline-6,7,12-triones and pyrano[3,2-c]quinoline-6,7,8,13-tetraones derivatives as ERK inhibitors with efficacy in BRAF-mutant melanoma in 2019, Cited 57. The Name is 4-Hydroxyquinolin-2(1H)-one. Through research, I have a further understanding and discovery of 86-95-3.

Approximately 60% of human cancers exhibit enhanced activity of ERK1 and ERK2, reflecting their multiple roles in tumor initiation and progression. Acquired drug resistance, especially mechanisms associated with the reactivation of the MAPK (RAF/MEK/ERK) pathway represent a major challenge to current treatments of melanoma and several other cancers. Recently, targeting ERK has evolved as a potentially attractive strategy to overcome this resistance. Herein, we report the design and synthesis of novel series of fused naphthofuro[3,2-c] quinoline-6,7,12-triones 3a-f and pyrano[3,2-c]quinoline-6,7,8,13-tetraones 5a,b and 6, as potential ERK inhibitors. New inhibitors were synthesized and identified by different spectroscopic techniques and X-ray crystallography. They were evaluated for their ability to inhibit ERK1/2 in an in vitro radioactive kinase assay. 3b and 6 inhibited ERK1 with IC50s of 0.5 and 0.19 mu M, and inhibited ERK2 with IC50s of 0.6 and 0.16 mu M respectively. Kinetic mechanism studies revealed that the inhibitors are ATP-competitive inhibitors where 6 inhibited ERK2 with a K-i of 0.09 mu M. Six of the new inhibitors were tested for their in vitro anticancer activity against the NCI-60 panel of tumor cell lines. Compound 3b and 6 were the most potent against most of the human tumor cell lines tested. Moreover, 3b and 6 inhibited the proliferation of the BRAF mutant A375 melanoma cells with IC50s of 3.7 and 0.13 mu M, respectively. In addition, they suppressed anchorage-dependent colony formation. Treatment of the A375 cell line with 3b and 6 inhibited the phosphorylation of ERK substrates p-90RSK and ELK-1 and induced apoptosis in a dose dependent manner. Finally, a molecular docking study showed the potential binding mode of 3b and 6 within the ATP catalytic binding site of ERK2.

Welcome to talk about 86-95-3, If you have any questions, you can contact Aly, AA; El-Sheref, EM; Bakheet, MEM; Mourad, MAE; Brase, S; Ibrahim, MAA; Nieger, M; Garvalov, BK; Dalby, KN; Kaoud, TS or send Email.. Name: 4-Hydroxyquinolin-2(1H)-one

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Authors Aksoy, BT; Kesan, G; Ozcan, E; Ecik, ET; Dere, A; Karabulut, A; Yakuphanoglu, F; Cosut, B in ROYAL SOC CHEMISTRY published article about ORGANIC SEMICONDUCTOR; HIGH-PERFORMANCE; FLUORESCENCE; DERIVATIVES; 1,3,5-TRIAZINE; SILICON; PHOTODETECTOR; COMPLEX; DONOR; FILMS in [Aksoy, Burcu Topaloglu; Ozcan, Emrah; Cosut, Bunyemin] Gebze Tech Univ, Dept Chem, Kocaeli, Turkey; [Kesan, Gurkan; Ozcan, Emrah] Univ South Bohemia, Inst Phys, Fac Sci, Branisovska 1760, Ceske Budejovice 37005, Czech Republic; [Ecik, Esra Tannverdi] Ataturk Univ, Dept Chem, Erzurum, Turkey; [Dere, Aysegul; Yakuphanoglu, Fahrettin] Firat Univ, Nanosci & Nanotechnol Lab, Elazig, Turkey; [Yakuphanoglu, Fahrettin] Firat Univ, Fac Sci, Dept Phys, Elazig, Turkey; [Karabulut, Abdulkerim] Sinop Univ, Fac Engn, Dept Elect & Elect Engn, Sinop, Turkey in 2020.0, Cited 45.0. Computed Properties of C7H6O2. The Name is 3-Hydroxybenzaldehyde. Through research, I have a further understanding and discovery of 100-83-4

Solution-processed organic photodiodes can function as thin-film candidates for solid-state photosensors in various optoelectronic applications due to the physical and chemical tuneability. In spite of their exclusive optical, structural, and electronic properties, the development of BODIPY based organic phodiodes has lagged behind that of other luminescent chromophore units. Here, we demonstrate the design, synthesis, and characterization of new BODIPY decorated triazine tripods for next-generation solution-processed photosensor applications. The photophysical and thermal properties of the BODIPY decorated triazines were determined. Furthermore, the photo-electrochemical properties of the synthesized compounds have been studied in detail using a photoconductivity measurement system. The potential of the prepared diodes as sensors in solar tracking systems has been investigated. Also, quantum chemical calculations were applied to those compounds to examine the effect of both OH groups and different binding positions on those compounds in comparison with experimentally observed data. As a potential application area, the photodiode properties of the designed molecules were tested here. The obtained photoelectrical results indicate that BODIPY decorated triazine tripod based photodiodes can be used as a photosensor in optic control systems.

About 3-Hydroxybenzaldehyde, If you have any questions, you can contact Aksoy, BT; Kesan, G; Ozcan, E; Ecik, ET; Dere, A; Karabulut, A; Yakuphanoglu, F; Cosut, B or concate me.. Computed Properties of C7H6O2

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

An article Cu-Catalyzed O-alkylation of phenol derivatives with alkylsilyl peroxides WOS:000607730300012 published article about CHIRAL BIS(OXAZOLINE) LIGANDS; GENERATION; RADICALS in [Sakurai, Shunya; Kano, Taichi; Maruoka, Keiji] Kyoto Univ, Grad Sch Sci, Dept Chem, Sakyo Ku, Kyoto 6068502, Japan; [Maruoka, Keiji] Kyoto Univ, Grad Sch Pharmaceut Sci, Sakyo Ku, Kyoto 6068502, Japan; [Maruoka, Keiji] Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China in 2021.0, Cited 43.0. The Name is m-Methoxyphenol. Through research, I have a further understanding and discovery of 150-19-6. Formula: C7H8O2

A Cu-catalyzed O-alkylation of phenol derivatives using alkylsilyl peroxides as alkyl radical precursors is described. The reaction proceeds smoothly under mild reaction conditions and the use of two different ligands with a Cu catalyst provides a wide range of products. A mechanistic study suggested that the reaction proceeds via a radical mechanism.

Formula: C7H8O2. Welcome to talk about 150-19-6, If you have any questions, you can contact Sakurai, S; Kano, T; Maruoka, K or send Email.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Authors Chu, PC; Wu, YC; Chen, CY; Hung, YS; Chang, CS in FUTURE SCI LTD published article about in [Chu, Po-Chen] China Med Univ, Dept Cosmeceut, Taichung 40402, Taiwan; [Chu, Po-Chen] China Med Univ, Grad Inst Cosmeceut, Taichung 40402, Taiwan; [Chu, Po-Chen; Chang, Chih-Shiang] China Med Univ, Drug Dev Ctr, Taichung 40402, Taiwan; [Wu, Yu-Chieh; Chen, Chien-Yu; Hung, Yu-Syuan; Chang, Chih-Shiang] China Med Univ, Sch Pharm, Coll Pharm, Taichung 40402, Taiwan in 2021, Cited 35. Application In Synthesis of 3,4-Dimethoxybenzaldehyde. The Name is 3,4-Dimethoxybenzaldehyde. Through research, I have a further understanding and discovery of 120-14-9

Aim: Tumor cells adapt to hypoxic microenvironments by releasing the key transcription factor HIF-1 alpha, which promotes angiogenesis, glycolytic phenotype, metastasis and erythropoiesis, allowing proliferation amid low oxygen levels. Therefore, therapeutic targeting of HIF-1 alpha represents a viable strategy for cancer therapy. Methods & Results: The authors synthesized a series of novel tetrahydroquinazoline derivatives in six steps and demonstrated that their development had a unique ability to suppress HIF-1 alpha expression through proteasomal degradation. Conclusion: Among these compounds, CDMP-TQZ (8bf) exhibited the highest antiproliferative potency in human cancer cells, in part through downregulation of HIF-1 alpha.

Application In Synthesis of 3,4-Dimethoxybenzaldehyde. Welcome to talk about 120-14-9, If you have any questions, you can contact Chu, PC; Wu, YC; Chen, CY; Hung, YS; Chang, CS or send Email.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Recommanded Product: 150-19-6. Recently I am researching about CYCLIC PEPTIDE INHIBITORS; CANCER CELL-GROWTH; DEMETHYLASE 1; POLYAMINE OXIDASE; ANALOGS; TRANYLCYPROMINE; REEXPRESSION; INACTIVATOR; DERIVATIVES, Saw an article supported by the National Institutes of HealthUnited States Department of Health & Human ServicesNational Institutes of Health (NIH) – USA [1 RO1 CA149095, 1 RO1 CA204345]; Samuel Waxman Cancer Research Foundation; NATIONAL CANCER INSTITUTEUnited States Department of Health & Human ServicesNational Institutes of Health (NIH) – USANIH National Cancer Institute (NCI) [R01CA204345] Funding Source: NIH RePORTER. Published in ROYAL SOC CHEMISTRY in CAMBRIDGE ,Authors: Holshouser, S; Dunworth, M; Murray-Stewart, T; Peterson, YK; Burger, P; Kirkpatrick, J; Chen, HH; Casero, RA; Woster, PM. The CAS is 150-19-6. Through research, I have a further understanding and discovery of m-Methoxyphenol

We have previously described the synthesis and evaluation of 3,5-diamino-1,2,4-triazole analogues as inhibitors of the flavin-dependent histone demethylase LSD1. These compounds are potent inhibitors of LSD1 without activity against monoamine oxidases A and B, and promote the elevation of H3K4me2 levels in tumor cells in vitro. We now report that the cytotoxicity of these analogues in pancreatic tumor cells correlates with the overexpression of LSD1 in each tumor type. In addition, we show that a subset of these 3,5-diamino-1,2,4-triazole analogues inhibit a related flavin-dependent oxidase, the polyamine catabolic enzyme spermine oxidase (SMOX) in vitro.

Recommanded Product: 150-19-6. Welcome to talk about 150-19-6, If you have any questions, you can contact Holshouser, S; Dunworth, M; Murray-Stewart, T; Peterson, YK; Burger, P; Kirkpatrick, J; Chen, HH; Casero, RA; Woster, PM or send Email.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

An article Synthesis of New Fused Heterocyclic 2-Quinolones and 3-Alkanonyl-4-Hydroxy-2-Quinolones WOS:000496249500151 published article about FLUOROQUINOLONES; DERIVATIVES; INHIBITORS; MECHANISM; DESIGN; SIGNAL in [Aly, Ashraf A.; Hassan, Alaa A.; Mohamed, Nasr K.; Abd El-Haleem, Lamiaa E.] Menia Univ, Fac Sci, Chem Dept, El Minia 61519, Egypt; [Braese, Stefan] Karlsruhe Inst Technol, Inst Organ Chem, D-76131 Karlsruhe, Germany; [Braese, Stefan] Karlsruhe Inst Technol, Inst Toxicol & Genet, D-76344 Eggenstein Leopoldshafen, Germany; [Polamo, Mika; Nieger, Martin] Univ Helsinki, Dept Chem, POB 55,AI Virtasen Aukio 1, Helsinki 00014, Finland; [Brown, Alan B.] Florida Inst Technol, Chem Program, Melbourne, FL 32901 USA in 2019, Cited 31. The Name is 4-Hydroxyquinolin-2(1H)-one. Through research, I have a further understanding and discovery of 86-95-3. Quality Control of 4-Hydroxyquinolin-2(1H)-one

Herein, we report the synthesis of 5,12-dihydropyrazino[2,3-c:5,6-c ‘]difuro[2,3-c:4,5-c ‘]-diquinoline-6,14(5H,12H)diones, 2-(4-hydroxy-2-oxo-1,2-dihydroquinolin-3-yl)-1,4-diphenyl- butane-1,4-diones and 4-(benzo-[d]oxazol-2-yl)-3-hydroxy-1H-[4,5]oxazolo[3,2-a]pyridine-1-one. The new candidates were synthesized and identified by different spectroscopic techniques, and X-ray crystallography.

Quality Control of 4-Hydroxyquinolin-2(1H)-one. Bye, fridends, I hope you can learn more about C9H7NO2, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

In 2019.0 BIOORG CHEM published article about ALPHA-AMYLASE; DERIVATIVES; PIOGLITAZONE in [Bansal, Garima; Monga, Vikramdeep; Thanikachalam, Punniyakoti Veeraveedu; Chawla, Pooja] ISF Coll Pharm, Dept Pharmaceut Chem, Moga 142001, Punjab, India; [Singh, Shamsher] ISF Coll Pharm, Dept Pharmacol, Moga 142001, Punjab, India in 2019.0, Cited 29.0. The Name is 4′-Hydroxyacetophenone. Through research, I have a further understanding and discovery of 99-93-4. Name: 4′-Hydroxyacetophenone

A series of fourteen novel thiazolidine-2,4-dione derivatives clubbed with pyrazole moiety were synthesized via four step reaction procedure. Reactions were monitored by thin layer chromatography and were characterized by physicochemical and spectrophotometric (IR, Mass, (HNMR)-H-1 and (CNMR)-C-13) analysis. The spectral data were in good agreement with their structures. The title compounds were docked against peroxisome proliferated activated receptors (PPAR-gamma) and alpha-amylase and further evaluated for in vivo and in vitro antidiabetic, in vitro anti-inflammatory and antioxidant activities. Compound GB14 exhibited significant blood glucose lowering activity and was also found to be active inhibitor of alpha-amylase. Compound GB7 was found to be potent anti-inflammatory agent in terms of reducing inflammatory markers (TNF-alpha, IL-beta, MDA) and also showed antioxidant activity to good extent. Therefore, these compounds may be considered as promising candidates for the development of new antidiabetic agents.

Name: 4′-Hydroxyacetophenone. About 4′-Hydroxyacetophenone, If you have any questions, you can contact Bansal, G; Singh, S; Monga, V; Thanikachalam, PV; Chawla, P or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles