Tag: M.W=150-200

An article Synthesis and biological evaluation of quinazoline derivatives – A SAR study of novel inhibitors of ABCG2 WOS:000451498200035 published article about RESISTANCE PROTEIN BCRP/ABCG2; MULTIDRUG-RESISTANCE; SELECTIVE INHIBITORS; DRUG-RESISTANCE; HIGHLY POTENT; CANCER; TRANSPORTER; BCRP; EXPRESSION; CELLS in [Krapf, Michael K.; Gallus, Jennifer; Spindler, Anna; Wiese, Michael] Univ Bonn, Inst Pharmaceut, Immenburg 4, D-53121 Bonn, Germany in 2019, Cited 51. The Name is 3-(Trifluoromethyl)phenol. Through research, I have a further understanding and discovery of 98-17-9. Recommanded Product: 3-(Trifluoromethyl)phenol

Multidrug resistance (MDR) is a major obstacle for effective chemotherapeutic treatment of cancer frequently leading to failure of the therapy. MDR is often associated with the overexpression of ABC transport proteins like ABCB1 or ABCG2 which efflux harmful substances out of cells at the cost of ATP hydrolysis. One way to overcome MDR is to apply potent inhibitors of ABC transporters to restore the sensitivity of the cells toward cytostatic agents. This study focusses on the synthesis and evaluation of novel 2,4-disubstituted quinazoline derivatives regarding the structure-activity-relationship (SAR), their ability to reverse MDR and their mode of interaction with ABCG2. Hence, the inhibitory potency and selectivity toward ABCG2 was determined. Moreover, the intrinsic cytotoxicity and the reversal of MDR were investigated. Interaction type studies with the substrate Hoechst 33342 and conformational analyses of ABCG2 with 5D3 monoclonal antibody were performed for a better understanding of the underlying mechanisms. In our study we could further enhance the inhibitory effect against ABCG2 (compound 31, IC50: 55 nM) and identify the structural features that are crucial for inhibitory potency, the impact on transport activity and binding to the protein. (C) 2018 Elsevier Masson SAS. All rights reserved,

Recommanded Product: 3-(Trifluoromethyl)phenol. About 3-(Trifluoromethyl)phenol, If you have any questions, you can contact Krapf, MK; Gallus, J; Spindler, A; Wiese, M 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

An article Visit-to-visit variability of serum uric acid measurements and the risk of all-cause mortality in the general population WOS:000626516000003 published article about ASSOCIATION in [Tian, Xue; Zuo, Yingting; Zhang, Licheng; Luo, Yanxia] Capital Med Univ, Sch Publ Hlth, Dept Epidmiol & Hlth Stat, 10 Xitoutiao, Beijing 100069, Peoples R China; [Tian, Xue; Zuo, Yingting; Zhang, Licheng; Luo, Yanxia] Beijing Municipal Key Lab Clin Epidmiol, Beijing, Peoples R China; [Wang, Anxin] Capital Med Univ, Beijing Tiantan Hosp, China Natl Clin Res Ctr Neurol Dis, Beijing, Peoples R China; [Wang, Anxin] Capital Med Univ, Beijing Tiantan Hosp, Dept Neurol, Beijing, Peoples R China; [Chen, Shuohua; Wu, Shouling] North China Univ Sci & Technol, Kailuan Hosp, Dept Cardiol, 57 Xinhua East Rd, Tangshan 063000, Peoples R China in 2021.0, Cited 37.0. The Name is 3,4-Dimethoxybenzaldehyde. Through research, I have a further understanding and discovery of 120-14-9. Name: 3,4-Dimethoxybenzaldehyde

Background Evidence on longitudinal variability of serum uric acid (SUA) and risk of all-cause mortality in the general population is limited, as many prior studies focused on a single measurement of SUA. Methods A total of 53,956 participants in the Kailuan study who underwent three health examinations during 2006 to 2010 were enrolled. Variability of SUA was measured using the coefficient of variation (primary index), standard deviation, average real variability, and variability independent of the mean. Cox proportional hazard regressions were used to calculate the hazard ratio (HR) and 95% confidence interval (CI) for the association of variability of SUA with subsequent risk of all-cause mortality, considering its magnitude and the direction and across different baseline SUA categories. Results Over a median follow-up of 7.04 years, 2728 participants died. The highest variability of SUA was associated with an increased risk of all-cause mortality, the HR was 1.33 (95% CI, 1.20-1.49) compared with the lowest variability. In this group, both a large fall (HR, 1.28; 95% CI, 1.14-1.44) and rise (HR, 1.18; 95% 1.05-1.32) in SUA were related to risk of all-cause mortality. These associations were similar across different baseline SUA categories. Consistent results were observed in alternative measures of SUA variability. Moreover, individuals with higher variability in SUA were more related to common risk factors than those with stable SUA. Conclusions Higher variability in SUA was independently associated with the risk of all-cause mortality irrespective of baseline SUA and direction of variability in the general population.

Name: 3,4-Dimethoxybenzaldehyde. About 3,4-Dimethoxybenzaldehyde, If you have any questions, you can contact Tian, X; Wang, AX; Zuo, YT; Chen, SH; Zhang, LC; Wu, SL; Luo, YX 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

An article Novel Pyrazoloquinolin-2-ones: Design, synthesis, docking studies, and biological evaluation as antiproliferative EGFR-TK inhibitors WOS:000479184600037 published article about FACTOR RECEPTOR KINASE; SUBSTITUTED QUINOLINONES; PYRAZOLE DERIVATIVES; POTENTIAL ANTICANCER; ERLOTINIB; CANCER; CRIZOTINIB; CHEMISTRY; ASSAY in [Elbastawesy, Mohammed A., I; Ramadan, Mohamed] Al Azhar Univ, Fac Pharm, Dept Pharmaceut Organ Chem, Assiut 71524, Egypt; [Aly, Ashraf A.] Menia Univ, Fac Sci, Dept Chem, Al Minya 61519, Egypt; [Elshaier, Yaseen A. M. M.] Univ Sadat City, Fac Pharm, Dept Organ & Med Chem, Menoufia 32958, Egypt; [Youssif, Bahaa G. M.] Assiut Univ, Fac Pharm, Dept Pharmaceut Organ Chem, Assiut 71526, Egypt; [Brown, Alan B.] Florida Inst Technol, Program Chem, Melbourne, FL 32901 USA; [Abuo-Rahma, Gamal El-Din A.] Menia Univ, Fac Pharm, Dept Med Chem, Al Minya 61519, Egypt in 2019, Cited 50. The Name is 4-Hydroxyquinolin-2(1H)-one. Through research, I have a further understanding and discovery of 86-95-3. Formula: C9H7NO2

Two new series of diethyl 2-[2-(substituted-2-oxo-1,2-dihydroquinolin-4-yl)hydrazono]-succinates 6a-g and 1-(2-oxo-1,2-dihydroquinolin-4-yl)-1H-pyrazoles 7a-f have been designed and synthesized. The structures of the synthesized compounds were proved by IR, mass, NMR (2D) spectra and elemental analyses. The target compounds were evaluated for their in vitro cytotoxic activity against 60 cancer cell lines according to NCI protocol. Consequently, seven compounds were further examined against the most sensitive cell lines, leukemia CCRFCEM, and MOLT-4. 5-Amino-1-(6-bromo-2-oxo-1,2-dihydroquinolin-4-yl)-1H-pyrazole-3,4-dicarbonitrile (7f) was the most active product, with IC50= 1.35 uM and 2.42 uM against MOLT-4 and CCRF-CEM, respectively. Also, it showed a remarkable inhibitory activity compared to erlotinib on the EGFR TK with IC50 = 247.14 nM and 208.42 nM, respectively. Cell cycle analysis of MOLT-4 cells treated with 7f showed cell cycle arrest at G2/M phase (supported by Caspases, BAX and Bcl-2 studies) with a significant pro-apoptotic activity as indicated by annexin V-FITC staining. Moreover, the docking study indicated that both the pyrazole moiety and the quinolin-2-one ring showed good fitting into EGFR (PDB code: 1M17). In order to interpret SAR of the designed compounds, and provide a basis for further optimization, molecular docking of the synthesized compounds to known EGFR inhibitors was performed. The study illustrated the effect of several factors on the compounds’ activity.

About 4-Hydroxyquinolin-2(1H)-one, If you have any questions, you can contact Elbastawesy, MAI; Aly, AA; Ramadan, M; Elshaier, YAMM; Youssif, BGM; Brown, AB; Abuo-Rahma, GEDA or concate me.. Formula: C9H7NO2

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

Application In Synthesis of 3-(Trifluoromethyl)phenol. I found the field of Chemistry very interesting. Saw the article Ambident Reactivity of Phenolate Anions Revisited: A Quantitative Approach to Phenolate Reactivities published in 2019, Reprint Addresses Ofial, AR; Mayr, H (corresponding author), Ludwig Maximilians Univ Munchen, Dept Chem, Butenandtstr 5-13, D-81377 Munich, Germany.. The CAS is 98-17-9. Through research, I have a further understanding and discovery of 3-(Trifluoromethyl)phenol.

Prompted by the observation that the regioselectivities of phenolate reactions (C versus O attack) are opposite to the predictions by the principle of hard and soft acids and bases, we performed a comprehensive experimental and computational investigation of phenolate reactivities. Rate and equilibrium constants for the reactions of various phenolate ions with benzhydrylium ions (Aryl(2)CH(+)) and structurally related quinone methides have been determined photometrically in polar aprotic solvents. Quantum chemical calculations at the SMD(MeCN)/M06-2X/6-31+G(d,p) level confirmed that O attack is generally favored under kinetically controlled conditions, whereas C attack is favored under thermodynamically controlled conditions. Exceptions are diffusion limited reactions with strong electrophiles, which give mixtures of products arising from O and C attack, as well as reactions with metal alkoxides in nonpolar solvents, where oxygen attack is blocked by strong ion pairing. The Lewis basicity (LB) and nucleophilicity (N, s(N)) parameters of phenolates determined in this work can be used to predict whether their reactions with electrophiles are kinetically or thermodynamically controlled and whether the rates are activation-or diffusion-limited. Comparison of the measured rate constants for the reactions of phenolates with carbocations with the Gibbs energies for single electron transfer manifests that these reactions proceed via polar mechanisms.

Application In Synthesis of 3-(Trifluoromethyl)phenol. About 3-(Trifluoromethyl)phenol, If you have any questions, you can contact Mayer, RJ; Breugst, M; Hampel, N; Ofial, AR; Mayr, 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

An article Lewis Acid-Activated Reactions of Silyl Ketenes for the Preparation of alpha-Silyl Carbonyl Compounds WOS:000497259900009 published article about CATIONIC-POLYMERIZATION; EFFICIENT SYNTHESIS; CHEMISTRY; SILYLKETENES; POLYMERS in [Mitchell, Sarah M.; Xiang, Yuanhui; Matthews, Rachael; Arnburgey, Alexis M.] Case Western Reserve Univ, Dept Chem, 10900 Euclid Ave, Cleveland, OH 44106 USA; [Pentzer, Emily B.] Texas A&M Univ, Dept Mat Sci & Engn, 3003 TAMU, College Stn, TX 77843 USA; [Pentzer, Emily B.] Texas A&M Univ, Dept Chem, 3003 TAMU, College Stn, TX 77843 USA in 2019, Cited 29. The Name is 3-(Trifluoromethyl)phenol. Through research, I have a further understanding and discovery of 98-17-9. COA of Formula: C7H5F3O

Silyl-substituted ketenes are attractive molecular building blocks due to their stability and ease of storage, as opposed to unstable alkyl and aryl ketenes. To better understand the reactivity of silyl ketenes and, in turn, their use in the preparation of highly functionalized small molecules, the reaction of silyl ketenes with different nucleophiles was studied. The addition of alcohol, amine, or thiol nucleophiles to the central carbon of silyl ketene, followed by proton transfer afforded alpha-silyl ester, amide, or thio-ester, respectively. Catalytic amounts of Lewis acid greatly increase the rate of the reaction, and the impact of nucleophile, Lewis acid, and silyl substituent are evaluated. The small molecules produced from these reactions give insight into the use of silyl ketenes as building blocks for complex molecular structures.

COA of Formula: C7H5F3O. About 3-(Trifluoromethyl)phenol, If you have any questions, you can contact Mitchell, SM; Xiang, Y; Matthews, R; Arnburgey, AM; Pentzer, EB 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

I found the field of Pharmacology & Pharmacy very interesting. Saw the article Synthesis and biological evaluation of quinazoline derivatives – A SAR study of novel inhibitors of ABCG2 published in 2019. Recommanded Product: 3-(Trifluoromethyl)phenol, Reprint Addresses Wiese, M (corresponding author), Univ Bonn, Inst Pharmaceut, Immenburg 4, D-53121 Bonn, Germany.. The CAS is 98-17-9. Through research, I have a further understanding and discovery of 3-(Trifluoromethyl)phenol

Multidrug resistance (MDR) is a major obstacle for effective chemotherapeutic treatment of cancer frequently leading to failure of the therapy. MDR is often associated with the overexpression of ABC transport proteins like ABCB1 or ABCG2 which efflux harmful substances out of cells at the cost of ATP hydrolysis. One way to overcome MDR is to apply potent inhibitors of ABC transporters to restore the sensitivity of the cells toward cytostatic agents. This study focusses on the synthesis and evaluation of novel 2,4-disubstituted quinazoline derivatives regarding the structure-activity-relationship (SAR), their ability to reverse MDR and their mode of interaction with ABCG2. Hence, the inhibitory potency and selectivity toward ABCG2 was determined. Moreover, the intrinsic cytotoxicity and the reversal of MDR were investigated. Interaction type studies with the substrate Hoechst 33342 and conformational analyses of ABCG2 with 5D3 monoclonal antibody were performed for a better understanding of the underlying mechanisms. In our study we could further enhance the inhibitory effect against ABCG2 (compound 31, IC50: 55 nM) and identify the structural features that are crucial for inhibitory potency, the impact on transport activity and binding to the protein. (C) 2018 Elsevier Masson SAS. All rights reserved,

About 3-(Trifluoromethyl)phenol, If you have any questions, you can contact Krapf, MK; Gallus, J; Spindler, A; Wiese, M or concate me.. Recommanded Product: 3-(Trifluoromethyl)phenol

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 Cobalt(I)-Catalyzed Borylation of Unactivated Alkyl Bromides and Chlorides WOS:000516667200040 published article about NICKEL-CATALYZED BORYLATION; C-H BORYLATION; ALPHA,BETA-UNSATURATED CARBONYL; ALKYLBORONIC ESTERS; COUPLING REACTIONS; SECONDARY; HALIDES; FUNCTIONALIZATION; HYDROBORATION; REACTIVITY in [Verma, Piyush Kumar; Prasad, K. Sujit; Varghese, Dominic; Geetharani, K.] Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India in 2020, Cited 61. Computed Properties of C7H5F3O. The Name is 3-(Trifluoromethyl)phenol. Through research, I have a further understanding and discovery of 98-17-9

A cobalt-complex-catalyzed borylation of a wide range of alkyl halides with a diboron reagent (B(2)pin(2) or B(2 )neop(2)) has been developed under mild reaction conditions, demonstrating the first cobalt-mediated cross-coupling with alkyl electrophiles. This protocol allows alkyl boronic esters to be accessed from alkyl halides, including alkyl chlorides, which were used rarely as coupling partners. Mechanistic studies reveal the possible involvement of an alkyl radical intermediate in this cobalt-mediated catalytic cycle.

Computed Properties of C7H5F3O. About 3-(Trifluoromethyl)phenol, If you have any questions, you can contact Verma, PK; Prasad, KS; Varghese, D; Geetharani, K 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

HPLC of Formula: C7H5F3O. I found the field of Pharmacology & Pharmacy very interesting. Saw the article Identification of 5-Substituted 2-Acylaminothiazoles That Activate Tat-Mediated Transcription in HIV-1 Latency Models published in 2019, Reprint Addresses Sleebs, BE (corresponding author), Walter & Eliza Hall Inst Med Res, Parkville, Vic 3052, Australia.; Sleebs, BE (corresponding author), Univ Melbourne, Dept Med Biol, Parkville, Vic 3052, Australia.. The CAS is 98-17-9. Through research, I have a further understanding and discovery of 3-(Trifluoromethyl)phenol.

The persistent reservoir of cells latently infected with human immunodeficiency virus (HIV)-integrated proviral DNA necessitates lifelong suppressive antiretroviral therapy (ART). Epigenetic targeted compounds have shown promise as potential latency-reversing agents; however, these drugs have undesirable toxicity and lack specificity for HIV. We utilized a novel HEK293-derived FlpIn dual-reporter cell line, which quantifies specific HIV provirus reactivation (LTR promoter) relative to nonspecific host cell gene expression (CMV promoter), to identify the 5-substituted 2-acylaminothiazole hit class. Here, we describe the optimization of the hit class, defining the functionality necessary for HIV gene activation and for improving in vitro metabolism and solubility. The optimized compounds displayed enhanced HIV gene expression in HEK293 and Jurkat 10.6 latency cellular models and increased unspliced HIV RNA in resting CD4+ T cells isolated from HIV-infected individuals on ART, demonstrating the potential of the 2-acylaminothiazole class as latency-reversing agents.

About 3-(Trifluoromethyl)phenol, If you have any questions, you can contact Nguyen, W; Jacobson, J; Jarman, KE; Sabroux, HJ; Harty, L; McMahon, J; Lewin, SR; Purcell, DF; Sleebs, BE or concate me.. HPLC of Formula: C7H5F3O

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

Formula: C9H10O3. In 2021.0 RSC ADV published article about LACTIM-LACTAM TAUTOMERISM; PHOTOPHYSICAL PROPERTIES; SUBSTITUTED IMIDAZOLES; SPECTROSCOPIC APPROACH; ANTIFUNGAL AGENTS; IONIC LIQUIDS; GREEN; OXIDATION; HYDROGEN; SYSTEM in [Kadu, Vikas D.; Mali, Ganesh A.; Khadul, Siddheshwar P.; Kothe, Gokul J.] Punyashlok Ahilyadevi Holkar Solapur Univ, Sch Chem Sci, Solapur 413255, Maharashtra, India in 2021.0, Cited 59.0. The Name is 3,4-Dimethoxybenzaldehyde. Through research, I have a further understanding and discovery of 120-14-9.

A rapid practical process has been developed for synthesis of 2,4,5-trisubstituted-imidazoles in excellent yields up to 95% from readily available starting materials. In this CuI catalyzed synthesis, trisubstituted imidazoles were afforded in short reaction times, wherein the substrate scope is well explored with benzoin as well as benzil reacting with different aldehydes in the presence of ammonium acetate as the nitrogen source.

Formula: C9H10O3. About 3,4-Dimethoxybenzaldehyde, If you have any questions, you can contact Kadu, VD; Mali, GA; Khadul, SP; Kothe, GJ 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

Authors Empel, C; Jana, S; Pei, C; Nguyen, TV; Koenigs, RM in AMER CHEMICAL SOC published article about INSERTION in [Empel, Claire; Jana, Sripati; Pei, Chao; Koenigs, Rene M.] Rhein Westfal TH Aachen, Inst Organ Chem, D-52074 Aachen, Germany; [Empel, Claire; Thanh Vinh Nguyen; Koenigs, Rene M.] Univ New South Waley, Sch Chem, Sydney, NSW 2052, Australia in 2020, Cited 44. Application In Synthesis of 3-(Trifluoromethyl)phenol. The Name is 3-(Trifluoromethyl)phenol. Through research, I have a further understanding and discovery of 98-17-9

In this work, we report a thorough investigation of the reaction of phenols with aryldiazoacetates. Mechanistic studies using different spectroscopic methods and theoretical calculations suggest a hydrogen bond between phenol and aryldiazoacetates, which can be modulated by the phenol acidity. The pK(A) of phenol and therefore the hydrogen bond plays an important role in a subsequent photoinduced proton transfer reaction to give the formal O-H functionalization product of phenols.

Application In Synthesis of 3-(Trifluoromethyl)phenol. About 3-(Trifluoromethyl)phenol, If you have any questions, you can contact Empel, C; Jana, S; Pei, C; Nguyen, TV; Koenigs, RM 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