Authors Dahi-Azar, S; Abdolmohammadi, S; Mokhtari, J in BENTHAM SCIENCE PUBL LTD published article about in [Dahi-Azar, Saman; Mokhtari, Javad] Islamic Azad Univ, Dept Chem, Sci & Res Branch, POB 14515-775, Tehran, Iran; [Abdolmohammadi, Shahrzad] Islamic Azad Univ, Dept Chem, East Tehran Branch, POB 18735-138, Tehran, Iran in 2021, Cited 47. Recommanded Product: 4-Methoxybenzaldehyde. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5
Aim and Objective: In the last decades, it has extensively been verified that nanostructured transition metal oxides emerge as inexpensive, available and extremely efficient heterogeneous catalysts in chemical transformations. The high electrical conductivity, high carrier concentration, and improved reactivity in cadmium oxide nanoparticles (CdO NPs) make it as a potential candidate for applications in the fields of nanocatalysis. [1]Benzopyran and pyridopyrimidine derivatives compose major classes of heterocyclic compounds, which have a wide spectrum of biological activities. Materials and Methods: In the present work, we report a facile and highly effective synthesis of 8aryl-8H-[ 1,3]dioxolo[4,5-g][1]benzopyran-6-carboxylic acids and 1,3-dimethyl-2,4-dioxo-5-phenyl-1,2,3,4,5,8-hexahydropyrido[2,3-d] pyrimidine- 7-carboxylic acids via CdO NPs catalyzed cyclo condensation reaction of 4-substituted phenylmethylidenepyruvic acids with 3,4-methylenedioxyphenol or 6-amino-1,3-dimethyluracil, which was accomplished under ethanoldrop grinding at room temperature. The described catalyst was prepared successfully by a simple precipitation method and characterized by the Fourier transformed infrared absorption (FT-IR) spectroscopy, X-Ray diffraction (XRD) analytical technique, and scanning electron microscopy (SEM). Results: A number of [1,3]dioxolo[g][1]benzopyran-6-carboxylic acids and pyrido[d]pyrimidine7-carboxylic acids were effectively synthesized in high yields (96-98%) within short reaction times (10-15 min). All synthesized compounds were well-characterized by IR, H-1 and C-13 NMR spectroscopy, and also by elemental analyses. Conclusion: In summary, we have developed a very simple and impressive procedure for the synthesis of 8-aryl-8H-[1,3]dioxolo[4,5-g][1] benzopyran- 6-carboxylic acids and 1,3-dimethyl-2,4- dioxo-5-phenyl-1,2,3,4,5,8-hexahydropyrido[2,3-d]pyrimidine-7- carboxylic acids as biologically interesting structures in the presence of CdO NPs as an efficient recyclable heterogeneous catalyst. The remarkable advantages for the offered protocol compared with traditional methods are short reaction time, good yields of the products, and the ease of operation with simple work-up procedure.
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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