Patent number: 6180759
Abstract: This invention is directed to a process for preparing a pseudotetrapeptide of formula I
or a salt or prodrug thereof wherein
is optionally nitrogen protected azaheterocyclyl;
is a single or double bond; q is 1-5; B is alkyl, cycloalkyl, cycloalkylalkyl, alkylcycloalkyl, alkylcycloalkylalkyl, aryl, aralkyl, alkylaryl, or alkylaralkyl; Q2 is H or a carboxylic acid protecting group; J is —H, alkyl, cycloalkyl, cycloalkylalkyl, alkylcycloalkyl, alkylcycloalkylalkyl, aryl, substituted aryl, aralkyl, substituted aralkyl; L is OR1, or NR1R2, where R1 and R2 are independently —H, alkyl, cycloalkyl, cycloalkylalkyl, alkylcycloalkyl, alkylcycloalkylalkyl, aryl, aralkyl, alkylaryl or alkylaralkyl; and p is 1 or 2 which comprises the coupling of two dipeptides or psuedopeptides.
Type:
Grant
Filed:
April 7, 2000
Date of Patent:
January 30, 2001
Assignee:
Aventis Pharmaceuticals Products Inc.
Inventors:
James J. Mencel, Robert Stammler, Christophe Daubie, Michel Lavigne, Benoit J. Vanasse, Robert C. Liu, Patrick Leon, Geoffrey A. D'Netto, Adam W. Sledeski