作者:Alexandre Lumbroso、Vincent Coeffard、David Gatineau、Sebastian Stecko、Isabelle Beaudet、Jean-Paul Quintard、Erwan Le Grognec
DOI:10.1002/ejoc.201600903
日期:2016.10
stannylated azadienes into stannylated dienyl oxazolidinones, a ring-closing metathesis generates dehydropiperidine or dehydroazepane; both are interesting scaffolds for the synthesis of polyfunctionnalized piperidines or azepanes. Whereas the dehydropiperidine synthesis was found to be selective regardless of the Grubbs catalyst used, we found that Grubbs II catalyst induced partial double bond isomerization
描述了衍生自 (S)-vinylglycinol 或 (S)-styrylglycinol 的 N-烷氧基羰基-2-三丁基甲锡烷基-1,3-恶唑烷的有效烯丙基化和丁烯基化。在将甲锡烷基化氮杂二烯转化为甲锡烷基化二烯基恶唑烷酮后,闭环复分解生成脱氢哌啶或脱氢氮杂环庚烷;两者都是合成多官能化哌啶或氮杂环庚烷的有趣支架。然而,无论使用何种 Grubbs 催化剂,脱氢哌啶的合成都是有选择性的,我们发现 Grubbs II 催化剂在脱氢氮杂环庚烷系列中诱导部分双键异构化。此外,当烯丙基三甲基硅烷用于N-烷氧基羰基-2-三丁基甲锡烷基-1,3-恶唑烷的开环反应时,可以选择性地获得环丙基衍生物。