Formal total syntheses of classic natural product target molecules via palladium-catalyzed enantioselective alkylation
作者:Yiyang Liu、Marc Liniger、Ryan M McFadden、Jenny L Roizen、Jacquie Malette、Corey M Reeves、Douglas C Behenna、Masaki Seto、Jimin Kim、Justin T Mohr、Scott C Virgil、Brian M Stoltz
DOI:10.3762/bjoc.10.261
日期:——
synthetic elaboration enables the formal totalsyntheses of a number of "classic" natural product target molecules. This publication highlights recent methods for setting quaternary and tetrasubstituted tertiary carbon stereocenters to address the synthetic hurdles encountered over many decades across multiple compound classes spanning carbohydrate derivatives, terpenes, and alkaloids. These enantioselective
The first enantiospecific synthesis of a thapsane, containing three contiguous quaternary carbon atoms, is accomplished starting from R-carvone. An intramolecular alkylation and an intramolecular diazoketone cyclopropanation reaction were employed for the stereo- and regiospecific generation of three contiguous quaternary carbon atoms present in the thapsane framework. (C) 2000 Published by Elsevier Science Ltd.