New Process for Preparing Benazepril Precursor
The present work relates to a new synthesis process for the preparation of 3-[(1-ethoxycarbonyl-3-phenylpropyl)-amino]-2, 3, 4, 5-tetrahydro-2-oxo-1H-1-benzazed pine 1-acetate tert butyl ester (EPTAB), the precursor of benazepril HCl. The reaction conditions were optimized. The diastereomeric products were separated by flash column chromatography. The structures of the products were characterized with IR and NMR.