Patent ID: 6372905
Filing Date: 2002-04-16
Classification: C07D

Abstract:
A process for the preparation of a compound of the formula: wherein R3 is loweralkyl, hydroxyalkyl or cycloalkylalkyl and P1 and P2 are independently selected from hydrogen and an N-protecting group comprising reacting a compound of the formula: wherein P1 and P2 are as defined above in an inert solvent with a compound of the formula: wherein R3 is as defined above and R4 is a nitrogen-containing heterocycle, bonded through a ring nitrogen atom to the carbonyl group, wherein the heterocycle is selected from the group consisting of imidazolyl, pyrrolyl, pyrazolyl, 1,2,3-triazolyl, 1,2,4-triazolyl, tetrazolyl, indolyl, benzimidazolyl and benzotriazolyl.