Synthesis and angiotensin-converting enzyme inhibitory activity of 3-(mercaptomethyl)-2-oxo-1-pyrrolidineacetic acids and 3-(mercaptomethyl)-2-oxo-1-piperidineacetic acids
1981; American Chemical Society; Volume: 24; Issue: 1 Linguagem: Inglês
10.1021/jm00133a021
ISSN1520-4804
AutoresS. KLUTCHKO, M. L. HOEFLE, Ronald D. Smith, Arnold D. Essenburg, Robert B. Parker, Vicki L. Nemeth, Michael J. Ryan, Deborah H. Dugan, Harvey Kaplan,
Tópico(s)Chemical Reaction Mechanisms
ResumoA number of gamma- and delta-lactam derivatives were synthesized and their in vitro angiotensin-converting enzyme (ACE) inhibitory activities were compared. The structures of these compounds were designed to include many of the important features of captopril. The synthesis involved the preparation of a variety of novel 3-methylene-2-pyrrolidinones (3-5 and 16) and 3-methylene-2-piperidinones (3a-5a, 10-12, and 17). The key intermediate 3-methylenelactams 3 and 3a were obtained from 3-(hydroxymethyl)lactams 2 and 2a by a direct dehydration with dicyclohexylcarbodiimide using cuprous iodide as a catalyst. Introduction of the sulfhydryl group was accomplished by a Michael addition of these alpha, beta-unsaturated lactams. The compound with the highest in vitro activity was 3-(mercaptomethyl)-2-oxo-1-piperidineacetic acid (7a). The activity of the 7a both in vitro and in vivo (dog) was shown to be less than that of captopril by a factor of about 100.
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