Anodic oxidation in a solution containing a variety of olefins and a small amount of Mn(OAc)2.4H2O brought about Mn+3-mediated carbon-carbon bond formation, such as efficient carboxymethylation of styrene derivatives to the corresponding gamma-aryl-gamma-butyrolactones, and selective coupling of active methylene compounds with non-activated monoolefins, unconjugated dienes or 5-arylpent-1-enes.
Lactones, Part 28: A New Approach for the Synthesis of α-Methylene Lactones from Alkenes
作者:Antoni Szumny、Czeslaw Wawrzenczyk
DOI:10.1055/s-2006-941598
日期:2006.6
A facile two-step procedure for synthesis of α-methylenelactones from alkenes and cycloalkenes is presented. Reactions carried out on some monoterpene alkenes afforded corresponding lactones in enantiomerically pure forms.