Inhibition of human chymase by 2-amino-3,1-benzoxazin-4-ones
摘要:
A series of 2-sec.amino-4H-3.1 -benzoxazin-4-ones was evaluated as acyl-enzyme inhibitors of human recombinant chymase. The compounds were also assayed for inhibition of human cathepsin G, bovine chemotrypsin, and human leukocyte elastase Introduction of an aromatic moiety into the 2-substituent resulted in strong inhibition of chymase. cathepsin G. and chymotrypsin. Extension of the N(Me)CH2Ph substituent by one methylene unit was unfavourable to inhibit these proteases Towards chymase, 2-(N-benzyl-N-methylamino)-4H-3, 1-benzoxazin-4-one (32) and 2-(N-benzyl-N-methylamino)-6-methyl-4H-3 1-benzoxazin-4-one (33) were found to exhibit K-i values of 11 and 17 nM, respectively, and form stable acyl-enzymes with half-lives of 53 and 25 min, respectively. Benzoxazinone 33 also inhibited the human chymase-catalyzed formation of angiotensin II from angiotensin I. (C) 2001 Elsevier Science Ltd. All rights reserved.
Inhibition of human chymase by 2-amino-3,1-benzoxazin-4-ones
摘要:
A series of 2-sec.amino-4H-3.1 -benzoxazin-4-ones was evaluated as acyl-enzyme inhibitors of human recombinant chymase. The compounds were also assayed for inhibition of human cathepsin G, bovine chemotrypsin, and human leukocyte elastase Introduction of an aromatic moiety into the 2-substituent resulted in strong inhibition of chymase. cathepsin G. and chymotrypsin. Extension of the N(Me)CH2Ph substituent by one methylene unit was unfavourable to inhibit these proteases Towards chymase, 2-(N-benzyl-N-methylamino)-4H-3, 1-benzoxazin-4-one (32) and 2-(N-benzyl-N-methylamino)-6-methyl-4H-3 1-benzoxazin-4-one (33) were found to exhibit K-i values of 11 and 17 nM, respectively, and form stable acyl-enzymes with half-lives of 53 and 25 min, respectively. Benzoxazinone 33 also inhibited the human chymase-catalyzed formation of angiotensin II from angiotensin I. (C) 2001 Elsevier Science Ltd. All rights reserved.
Aromatic 2-(Thio)ureidocarboxylic Acids As a New Family of Modulators of Multidrug Resistance-Associated Protein 1: Synthesis, Biological Evaluation, and Structure−Activity Relationships
Four series of aromatic carboxylic acids were prepared with a urea or thiourea moiety at the neighboring position to the carboxyl group and benzene or thiophene as aromatic scaffold. Using a calcein AM assay, these compounds were evaluated as inhibitors of multidrug resistance-associated protein I (MRP1) and selected compounds were examined toward P-glycoprotein (P-gp) as well as breast cancer resistance protein (BCRP) to assess selectivity for MRP1. Two 2-thioureidobenzo[b]-thiophene-3-carboxylic acids (48, 49) were identified as particularly potent inhibitors of MRP1, with IC50 values of around 1 mu M. The structural features of this new family or nontoxic MRP1 inhibitors include a (thio)urea disubstituted with preferentially two alkyl groups at the terminal nitrogen and an additional fused aromatic ring.
Inhibition of human chymase by 2-amino-3,1-benzoxazin-4-ones
作者:Ulf Neumann、Norman M. Schechter、Michael Gütschow
DOI:10.1016/s0968-0896(00)00310-2
日期:2001.4
A series of 2-sec.amino-4H-3.1 -benzoxazin-4-ones was evaluated as acyl-enzyme inhibitors of human recombinant chymase. The compounds were also assayed for inhibition of human cathepsin G, bovine chemotrypsin, and human leukocyte elastase Introduction of an aromatic moiety into the 2-substituent resulted in strong inhibition of chymase. cathepsin G. and chymotrypsin. Extension of the N(Me)CH2Ph substituent by one methylene unit was unfavourable to inhibit these proteases Towards chymase, 2-(N-benzyl-N-methylamino)-4H-3, 1-benzoxazin-4-one (32) and 2-(N-benzyl-N-methylamino)-6-methyl-4H-3 1-benzoxazin-4-one (33) were found to exhibit K-i values of 11 and 17 nM, respectively, and form stable acyl-enzymes with half-lives of 53 and 25 min, respectively. Benzoxazinone 33 also inhibited the human chymase-catalyzed formation of angiotensin II from angiotensin I. (C) 2001 Elsevier Science Ltd. All rights reserved.