Development of radical addition–cyclization–elimination reaction of oxime ether and its application to formal synthesis of (±)-martinelline
作者:Okiko Miyata、Atsushi Shirai、Shintaro Yoshino、Toshiki Nakabayashi、Yoshifumi Takeda、Toshiko Kiguchi、Daisuke Fukumoto、Masafumi Ueda、Takeaki Naito
DOI:10.1016/j.tet.2007.07.007
日期:2007.10
Radical addition–cyclization–elimination (RACE) reaction of oxime ether carrying unsaturated ester provides a novel method for the construction of pyrroloquinoline. Treatment of oxime ethers with Bu3SnH and AIBN gave N-norpyrroloquinoline as a major product, which was also obtained by the radical reaction of the corresponding hydrazone and imine. The radical reaction of aldehyde and ketone carrying
带有不饱和酯的肟醚的自由基加成-环化-消除(RACE)反应为吡咯并喹啉的构建提供了一种新方法。用Bu 3 SnH和AIBN处理肟醚,得到N-正吡咯并喹啉为主要产物,其也通过相应的hydr和亚胺的自由基反应获得。醛和酮携带的不饱和酯的自由基反应立体选择性地进行,得到顺式-呋喃喹啉和顺式-羟基酯。还研究了通过使用Bu 3 SnNMe 2,Bu 3 SnD和/或D 2 O中的每一种进行的RACE反应,以提出通向N的反应途径。-去吡咯并喹啉。此外,RACE反应的合成效用通过制备用于合成(±)-martinelline的关键中间体而得到证明。