First Synthesis of α,β-Unsaturated Lactones with High Diversity through the Passerini Reaction and Ring-Closing Metathesis (RCM)
作者:Almuth Schwäblein、Jürgen Martens
DOI:10.1002/ejoc.201100160
日期:2011.8
A new class of α,β-unsaturated pyran-2-carboxamides was easily accessed by a multicomponent reaction (MCR), followed by a ring-closing metathesis (RCM) using a ruthenium catalyst. In the first step, α-acyloxy carboxamides with two terminal double bonds were formed from terminal unsaturated carboxylic acids, allyl ketones, and isocyanides (Passerini reaction, P-3CR).
通过多组分反应 (MCR) 和随后使用钌催化剂的闭环复分解 (RCM),可以轻松获得一类新的 α,β-不饱和吡喃-2-甲酰胺。在第一步中,由末端不饱和羧酸、烯丙基酮和异氰化物形成具有两个末端双键的 α-酰氧基羧酰胺(Passerini 反应,P-3CR)。