Karabasanagouda; Adhikari, Airody Vasudeva; Girisha, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2009, vol. 48, # 3, p. 430 - 437
Karabasanagouda; Adhikari, Airody Vasudeva; Girisha, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2009, vol. 48, # 3, p. 430 - 437
Efficient Route to Highly Functionalized Chalcone-Based Pyranocoumarins via Iodine-Promoted Michael Addition Followed by Cyclization of 4-Hydroxycoumarins
作者:Naseem Ahmed、B. Venkata Babu
DOI:10.1080/00397911.2012.763099
日期:2013.11.17
Abstract Molecular iodine is used as an efficient promoter in the regioselective synthesis of highlyfunctionalized chalcone-based pyranocoumarin derivatives using 4-hydroxycoumarin in acetic acid solvent at 100 °C. Under optimized reaction conditions, our protocol (Michael addition followed by intermolecular cyclization) has tolerance for many functional groups and gave products in good to excellent
A One-Pot Synthesis of Disubstituted Thiazoles from Chalcone C–H Bonds, Elemental Sulfur, and Glycine Ethyl Ester
作者:Tung T. Nguyen、Nam T. S. Phan、Cam T. H. Tran、Quyen D. Tran、Duc Ly、Thao T. Nguyen、Khang X. Nguyen
DOI:10.1055/s-0041-1737899
日期:2022.4
chalcones, glycine ethyl ester hydrochloride, and elementalsulfur toward a synthesis of 4,5-disubstituted thiazoles is reported. The transformation presumably proceeds via a sequence of β-C–H amination, annulation, and dealkoxycarbonylation. This tactic represents a rare example of a method for obtaining such disubstituted thiazoles directly from chalcone C–H bonds.