Functionalization of diazotetronic acid and application in a stereoselective modular synthesis of pulvinone, aspulvinones A–E, G, Q and their analogues
作者:Amarender Manchoju、Ritesh A. Annadate、Lise Desquien、Sunil V. Pansare
DOI:10.1039/c8ob01511b
日期:——
highly stereoselective aldol condensation of diazotetronic acid with aldehydes to provide 5-arylidene diazotetronates. Subsequent catalytic intermolecular C–H insertion reactions of the arylidene tetronates with arenes provide a series of naturally occurring aspulvinones including aspulvinones C, D and Q which have not been synthesized before. Variation of the aldehyde and the arene components furnishes
开发了一种模块化合成的aspulvinones A,B,C,D,E,G和最近分离的aspulvinoneQ。该方法的特点是重氮杂环丁酸与醛类具有高度立体选择性的羟醛缩合反应,可提供5-亚芳基重氮杂环戊酸酯。随后的亚芳基四价酸盐与芳烃的催化分子间CH–H插入反应提供了一系列天然存在的aspulvinones,包括以前从未合成过的aspulvinones C,D和Q。醛和芳烃成分的变化提供了aspulvinones的合成类似物。