Silver(II) oxide-mediated synthesis of 2,4-diarylquinazolines
作者:Wing Cheung、Raymond J. Patch、Mark R. Player
DOI:10.1016/j.tetlet.2018.05.019
日期:2018.6
4-diarylquinazolines is described which involves a silver oxide-mediated CH activation/CN bond formation process. The generality of this method with respect to substituent effects is presented along with studies leading to process optimization. Mechanistic investigations provide support for the involvement of radical intermediates in the reaction process.
描述了合成2,4-二芳基喹唑啉的单釜法,该法涉及氧化银介导的C H活化/ C N键形成过程。提出了有关取代基效应的通用方法以及导致工艺优化的研究。机理研究为自由基中间体参与反应过程提供了支持。
Chemistry and hypoglycemic activity of benzimidoylpyrazoles
作者:James R. Shroff、Victor Bandurco、Rohit Desai、Sidney Kobrin、Peter Cervoni
DOI:10.1021/jm00144a031
日期:1981.12
(tolazamide, phenformin, and buformin) in several experimental models show that these compounds seem to combine in one molecule some of the biological activities of the beta-cytotrophic sulfonylureas and some of the activities of the biguanides. A synthetic scheme for the preparation of the benzimidolypyrazoles and a preliminary structure-activity relationship are presented.
proceeds via a palladium-catalyzed [3+2] cyclization of isocyanides with alkynyl imines. In this transformation, the palladium catalyst has a triple role, serving simultaneously as a π acid, a transition-metal catalyst and a hydride ion donor, thus enabling the dual function of isocyanide both as a C1 synthon for cyanation and a C1N1 synthon for imidoylation. Significantly, the reaction is the sole successful