Divergent Syntheses of Indoles and Quinolines Involving N1–C2–C3 Bond Formation through Two Distinct Pd Catalyses
作者:Su San Jang、Young Ho Kim、So Won Youn
DOI:10.1021/acs.orglett.0c02898
日期:2020.12.4
annulative couplings of 2-alkenylanilines with aldehydes using alcohols as both the solvent and hydrogen source have been developed. These domino processes allow divergent syntheses of two significant N-heterocycles, indoles and quinolines, from the same substrate by tuning reaction parameters, which seems to invoke two distinct mechanisms. The nature of the ligand and alcoholic solvent had a profound
已经开发了使用醇作为溶剂和氢源的Pd催化的2-链烯基苯胺与醛的环状偶联。这些多米诺过程允许通过调节反应参数从同一底物上不同的合成两个重要的N杂环(吲哚和喹啉),这似乎调用了两种不同的机制。配体和醇溶剂的性质对这些方案的选择性和效率产生了深远的影响。尤其值得注意的是,吲哚的形成是通过克服两个重大挑战而实现的:烯烃的区域选择性加氢palpalpalation和随后的Csp 3 -Pd物种与反应性较低的亚胺之间的后续反应。