Inhibition of human leukocyte elastase by functionalized N-aryl azetidin-2-ones: substituent effects at C-3 and benzylic positions
摘要:
A series of functionalized N-aryl azetidin-2-ones with a latent alkylating group was prepared by a flexible four-step synthesis. They met criteria expected for a suicide-type inactivation of human leukocyte elastase (HLE) and porcine pancreatic elastase (PPE), with no inactivation of trypsin- and chymotrypsin-like proteases. The inhibition potency was dependent on the halogen substituents at C-3 (F, F; Cl, Cl; Br, Br) and the nature and the position relative to nitrogen of the latent benzylic leaving group (F, Cl, Br). Better inactivations of HLE compared with PPE were observed with azetidinones gem-disubstituted by Cl and Br rather than by F. Their protio analogs, which are devoid of the latent quinoniminium methide electrophile, behave as simple substrates of elastases.
Inhibition of human leukocyte elastase by functionalized N-aryl azetidin-2-ones: substituent effects at C-3 and benzylic positions
摘要:
A series of functionalized N-aryl azetidin-2-ones with a latent alkylating group was prepared by a flexible four-step synthesis. They met criteria expected for a suicide-type inactivation of human leukocyte elastase (HLE) and porcine pancreatic elastase (PPE), with no inactivation of trypsin- and chymotrypsin-like proteases. The inhibition potency was dependent on the halogen substituents at C-3 (F, F; Cl, Cl; Br, Br) and the nature and the position relative to nitrogen of the latent benzylic leaving group (F, Cl, Br). Better inactivations of HLE compared with PPE were observed with azetidinones gem-disubstituted by Cl and Br rather than by F. Their protio analogs, which are devoid of the latent quinoniminium methide electrophile, behave as simple substrates of elastases.
N-aryl-azetidinones, their preparation process and their use as elastase
申请人:Scientifique
公开号:US05030628A1
公开(公告)日:1991-07-09
The invention relates to N-aryl-azetidinones, their preparation process and their use as active serine elastase inhibitors. The N-aryl-azetidinones are in accordance with formula: ##STR1## in which R.sup.1 and R.sup.2 can be a halogen atom or an organic radical, R.sup.3 represents a halogen atom or another good starting group and R.sup.4 represents H or an organic radical. The compounds with R.sup.3 .dbd.Cl or OSO.sub.2 CH.sub.3, R.sup.4 .dbd.H and R.sup.1 .dbd.R.sup.2 .dbd.F or R.sup.1 .dbd.F and R.sup.2 .dbd.Br are irreversible and selective elastase inhibitors.
A series of functionalized N-aryl azetidin-2-ones with a latent alkylating group was prepared by a flexible four-step synthesis. They met criteria expected for a suicide-type inactivation of human leukocyte elastase (HLE) and porcine pancreatic elastase (PPE), with no inactivation of trypsin- and chymotrypsin-like proteases. The inhibition potency was dependent on the halogen substituents at C-3 (F, F; Cl, Cl; Br, Br) and the nature and the position relative to nitrogen of the latent benzylic leaving group (F, Cl, Br). Better inactivations of HLE compared with PPE were observed with azetidinones gem-disubstituted by Cl and Br rather than by F. Their protio analogs, which are devoid of the latent quinoniminium methide electrophile, behave as simple substrates of elastases.