Inhibition of the mammalian .beta.-lactamase renal dipeptidase (dehydropeptidase-I) by Z-2-(acylamino)-3-substituted-propenoic acids
摘要:
The title enzyme deactivates the potent carbapenem antibiotic imipenem in the kidney, producing low antibiotic levels in the urinary tract. A series of (Z)-2-(acylamino)-3-substituted-propenoic acids (3) are specific, competitive inhibitors of the enzyme capable of increasing the urinary concentration of imipenem in vivo. Many of the compounds were prepared in one step from an alpha-keto acid and a primary amide. The optimum R2 groups are 2,2-dimethyl, -dichloro, and -dibromocyclopropyl. With R2 = 2,2-dimethylcyclopropyl (DMCP), a wide variety of R3 groups including alkyl, oxa- and thiaalkyl, and alkyl groups containing acidic, basic, and neutral substituents give effective inhibitors with Ki values of 0.02-1 microM and a range of pharmacokinetic properties. By resolution of enantiomers and X-ray crystallography, the enzyme-inhibitory activity of the DMCP group was found to reside with the 1S isomer. The cysteinyl compound 176 (cilastatin, MK-0791) has the desired pharmacological properties and has been chosen for combination with imipenem.
Inhibition of the mammalian .beta.-lactamase renal dipeptidase (dehydropeptidase-I) by Z-2-(acylamino)-3-substituted-propenoic acids
摘要:
The title enzyme deactivates the potent carbapenem antibiotic imipenem in the kidney, producing low antibiotic levels in the urinary tract. A series of (Z)-2-(acylamino)-3-substituted-propenoic acids (3) are specific, competitive inhibitors of the enzyme capable of increasing the urinary concentration of imipenem in vivo. Many of the compounds were prepared in one step from an alpha-keto acid and a primary amide. The optimum R2 groups are 2,2-dimethyl, -dichloro, and -dibromocyclopropyl. With R2 = 2,2-dimethylcyclopropyl (DMCP), a wide variety of R3 groups including alkyl, oxa- and thiaalkyl, and alkyl groups containing acidic, basic, and neutral substituents give effective inhibitors with Ki values of 0.02-1 microM and a range of pharmacokinetic properties. By resolution of enantiomers and X-ray crystallography, the enzyme-inhibitory activity of the DMCP group was found to reside with the 1S isomer. The cysteinyl compound 176 (cilastatin, MK-0791) has the desired pharmacological properties and has been chosen for combination with imipenem.
Novel chemical compounds are provided which selectively inhibit the metabolism of dipeptidase (E.C.3.4.13.11) and therefore are useful in combination with antibacterial products. These chemical compounds are z-2-acylamino-3-monosubstituted propenoates.
Combination of thienamycin-type antibiotics with dipeptidase inhibitors
申请人:Merck & Co., Inc.
公开号:US04539208A1
公开(公告)日:1985-09-03
A novel antibacterial drug combination is provided, one component being a fused ring .beta.-lactam, such as thienamycin and its semi-synthetic derivatives, and the other component is a dipeptidase (E.C. 3.4.13.11) inhibitor. The dual-component combination is formulated so that 1 to 3 parts by weight of the .beta.-lactam compound are employed for 30 to 1 parts by weight of the inhibitor compound.
2-(Cyclopropane-carboxamido)-2-alkenoic acids, their esters and salts, and antibacterial compositions comprising the same and a thienamycin-type compound
申请人:Merck & Co., Inc.
公开号:EP0048301A1
公开(公告)日:1982-03-31
ω-(2-Amino-2-carboxyethylthiol-2-(cyclopropane- carboxamido)-2-alkenoic acids, their esters and salts of the formula
in the Z configuration, wherein R2 is 2,2-dimethylcyclopropyl or 2,2-dichlorocyclopropyl; R' is hydrogen, loweralkyl of 1-6 carbon atoms, dialkylaminoalkyl with 1-6 carbon atoms in each alkyl group, or a pharmaceutically acceptable cation; R3 is an alkylene chain of 3-7 carbon atoms, having a terminal substituent which is 2-amino-2-carboxyethylthio, or 1-(phosphono)ethylamino which selectively inhibit the metabolism of dipeptidase (E.C:3.4.13.11) and therefore are useful in combination with antibacterial products, by preference with the thienamycin class of compounds.
Use of substituted propenoates to prevent nephrotoxicity of certain
申请人:Merck & Co., Inc.
公开号:US04668504A1
公开(公告)日:1987-05-26
Antibiotics to prevent nephrotoxicity.
使用抗生素以预防肾毒性。
Combination of 2-substituted carbapenems with dipeptidase inhibitors
申请人:Merck & Co., Inc.
公开号:US05071843A1
公开(公告)日:1991-12-10
A combination of a carbapenem of the formula: ##STR1## where R is H or CH.sub.3 and R.sup.1 is ##STR2## with a renal dipeptidase inhibitor is disclosed.