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-closingmetathesis (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 (Passerinireaction, P-3CR).