Efficient Large Scale Preparation of Neutral Endopeptidase/Angiotensin-Converting Enzyme Dual Inhibitor CGS30440
作者:Erik P. Johnson、William R. Cantrell,、Todd M. Jenson、Scott A. Miller、David J. Parker、Noela M. Reel、Leo G. Sylvester、Robert J. Szendroi、Kevin J. Vargas、Jean Xu、John A. Carlson
DOI:10.1021/op970242s
日期:1998.7.1
The development and piloting of a potential manufacturing process for ACE/NEP dual inhibitor CGS30440 is described. The synthesis proceeds sequentially from 1-aminocyclopentanecarboxylic acid via N-protection, peptide coupling with L-tyrosine ethyl ester, O-methylation of N-protected [(1-amino-1-cyclopentyl)carbonyl]-L-tyrosine ethyl ester, N-deprotection, peptide coupling of [(1-amino-1-cyclopentyl)carbonyl]-O-methyl-L-tyrosine ethyl ester with D-2-bromo-3methylbutyric acid, and final displacement of bromide with thioacetate. This approach is superior to shorter Discovery routes based upon final peptide coupling of L-2-(acetylthio)-3-methylbutanoic acid to [(1-amino-1-cyclopentyl)carbonyl]-O-methyl-L-tyrosine ethyl ester.