Stereospecific approach to 3-oxocen-7-ones via aliphatic claisen rearrangement. synthesis of (+)-(2R,8S)- and (+)-(2R,8J)-lauthisan
作者:Leo A. Paquette、Thomas J. Sweeney
DOI:10.1016/s0040-4020(01)85577-0
日期:1990.1
A general synthetic strategy based upon thermally-induced Claisen ring expansion as the pivotal step allows for rapid elaboration of the lauthisans in enantiomerically pure condition and proper absolute configuration. The short sequence (nine steps) constitutes a new and versatile route to naturally occurring medium-ring ethers.