Synthesis of Filibuvir. Part I. Diastereoselective Preparation of a β-Hydroxy Alkynyl Oxazolidinone and Conversion to a 6,6-Disubstituted 2<i>H</i>-Pyranone
作者:Robert A. Singer、John A. Ragan、Paul Bowles、Esmort Chisowa、Brian G. Conway、Eric M. Cordi、Kyle R. Leeman、Leo J. Letendre、Janice E. Sieser、Gregory W. Sluggett、Corey L. Stanchina、Holly Strohmeyer、Jon Blunt、Stuart Taylor、Ciaran Byrne、Denis Lynch、Sandra Mullane、Maria M. O’Sullivan、Marcella Whelan
DOI:10.1021/op4002356
日期:2014.1.17
This is the first in a series of three papers describing the identification and development of a commercial synthesis of filibuvir (1). This contribution describes development of an Evans aldol reaction to control the tertiary alcohol stereocenter, a challenging variant of that strategy in that both reacting partners were nonstandard (acetate etiolate and ketone electrophile). A sequence consisting of Sonogashira coupling, acylation and hydrogenation delivered acetate 24, and Dieckmann cyclization provided beta-keto lactone 2.