Synthesis of Chiral 3-Substituted Hexahydropyrroloindoline via Intermolecular Cyclopropanation
作者:Hao Song、Jun Yang、Wei Chen、Yong Qin
DOI:10.1021/ol062489s
日期:2006.12.1
new and efficient synthetic route to chiral 3-substituted hexahydropyrroloindoline 18 possessing absolute configurations in accordance with indole alkaloids has been developed from readily available L-tryptophan. The key step relies on the one-pot cascade reaction of oxazolidinone 17 with diazoester, which proceeds through intermolecular cyclopropanation, ring opening, and cyclization.
[结构:见正文]从容易获得的L-色氨酸开发了一种新的,有效的合成路线,该路线合成具有吲哚生物碱绝对构型的手性3-取代的六氢吡咯并吲哚啉18。关键步骤取决于恶唑烷酮17与重氮酯的一锅级联反应,该反应通过分子间环丙烷化,开环和环化进行。