作者:David M. Fischer、Henry Lindner、Willi M. Amberg、Erick M. Carreira
DOI:10.1021/jacs.2c11680
日期:2023.1.18
Intermolecular cyclopropanation of mono-, di-, and trisubstituted olefins with α-bromo-β-ketoesters and α-bromomalonates under organophotocatalysis is reported. The reaction displays broad functional group tolerance, including substrates bearing acids, alcohols, halides, ethers, ketones, nitriles, esters, amides, carbamates, silanes, stannanes, boronic esters, as well as arenes, and furnishes highly
报道了单、二和三取代烯烃与 α-溴-β-酮酯和 α-溴丙二酸酯在有机光催化下的分子间环丙烷化反应。该反应显示出广泛的官能团耐受性,包括带有酸、醇、卤化物、醚、酮、腈、酯、酰胺、氨基甲酸酯、硅烷、锡烷、硼酸酯和芳烃的底物,并提供高度取代的环丙烷。该转化可以在空气和水分存在下用0.5mol%的苯并噻嗪并喹喔啉作为有机光催化剂进行。进行了涉及 Stern-Volmer 猝灭、量子产率测定和氘化实验的机理研究,并讨论了转化的催化循环。