Sulfur-containing acylamino acids. I. Syntheses and angiotensin I converting enzyme-inhibitory activities of sulfur-containing N-mercaptoalkanoyl amino acids.
A series of mercaptoacylamino acids was synthesized and screened as angiotensin I-converting enzyme inhibitors. The inhibitory activities of these compounds were compared with that of (2S)-1-[(2S)-3-mercapto-2-methylpropanoyl] proline. The structureactivity relationship of the compounds is discussed.
The synthesis and antihypertensive activity of a new series of N-(mercaptoacyl)-thiazolidinecarboxylic acids (VIIa-d) are described. Antihypertensive activity was evaluated in terms of angiotensin I-converting enzyme (ACE) inhibitory activity. The activities of these compounds were compared with that of (2S)-1-[(2S)-3-mercapto-2-methylpropanoyl] proline, SQ 14225, and many of them were found to be relatively potent inhibitors of ACE. The most potent was (4R)-2-(2-hydroxyphenyl)-3-(3-mercaptopropanoyl)-4-thiazolidinecarboxylic acid (62). Structure-activity relationships among the thiazolidines and some related compounds are discussed.
A series of 1-[acylthio) and (mercapto)-1-oxoalkyl]-1,2,3,4-tetrahydroquinoline-2-carboxylic acids and salts thereof are useful as Angiotensin I converting enzyme inhibitors.
New sulfhydryl compounds with potent antihypertensive activities.
作者:ITARU MITA、JUNICHI IWAO、MASAYUKI OYA、TAKEHISA CHIBA、TADASHI ISO
DOI:10.1248/cpb.26.1333
日期:——
(4R)-3-(Mercaptoacyl)-4-thiazolidinecarboxylic acids (III) were synthesized and their inhibitory activities against angiotensin-converting enzyme (ACE) were examined in vitro and in vivo. (4R)-3-[(2S)-3-Mercapto-2-methylpropanoyl]-4-thiazolidinecarboxylic acid (4a) was the most potent orally active inhibitor of ACE among the derivatives and its activity was almost same as that of (2S)-1-[(2S)-3-mercapto-2-methylpropanoyl] proline (8).