| 摘要 |
<p>There is disclosed a process for the preparation of compounds having ACE inhibitory action of formula (1) wherein R has the meanings as in claim 1, wherein the stereospecific amino acid N-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-L-alanine is carboxylically activated with a thionyl chloride derivative wherein at least one chlorine atom is replaced by the residue of a heterocylic ambident compound such as imidazole, benzimidazole, 2-methylimidazole or triazole, especially chlorothionylimidazole or thionyldiimidazole, in the presence of an organic solvent to the intermediate novel compound A or to the intermediate novel compound B and the obtained intermediate compound is reacted with an amino acid, preferably in the monosilylated form, most preferably in the disilylated form. Disclosed are also novel compounds useful as starting materials or intermediates in the present process.</p> |
