Practical synthesis of a cell adhesion inhibitor by self-regeneration of stereocenters
作者:Nathan K. Yee、Laurence J. Nummy、Rogelio P. Frutos、Jinhua J. Song、Elio Napolitano、Denis P. Byrne、Paul-James Jones、Vittorio Farina
DOI:10.1016/j.tetasy.2003.08.039
日期:2003.11
An efficient enantiospecific synthesis of the cell adhesion inhibitor BIRT-377 by self-regeneration of stereocenters has been achieved in 38% overall yield in eight steps. The key transformations involve the stereoselective formation of the trans imidazolidinone 7, subsequent alkylation, and the efficient hydrolysis of disubstituted imidazolidinone 9. The process is practical, robust. and cost-effective; it has been successfully implemented in the pilot plant to produce multikilogram quantities of the drug BIRT-377 1. (C) 2003 Elsevier Ltd. All rights reserved.