Carboxylic acid derivatives, their preparation and use

Details Carboxylic acid derivatives, their preparation and use Carboxylic acid derivatives, their preparation and use

1997-03-27

1999-08-03

Shah, Mukund J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

544299, 544300, 544301, 544302, 544309, 544310, 544312, 544314, 544315, 544316, 544317, 544318, 544319, 544322, 544326, 544327, 544328, 544329, 544335, C07D23960, C07D40312, C07D25130, C07D23996

Patent

active

059327308

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to novel carboxylic acid derivatives, their preparation and use.
Endothelin is a peptide which is composed of 21 amino acids and is synthesized and released by the vascular endothelium. Endothelin exists in three isoforms, ET-1, ET-2 and ET-3. In the following text, "endothelin" or "ET" signifies one or all isoforms of endothelin. Endothelin is a potent vasoconstrictor and has a potent effect on vessel tone. It is known that this vasoconstriction is caused by binding of endothelin to its receptor (Nature, 332, (1988) 411-415; FEBS Letters, 231, (1988) 440-444 and Biochem. Biophys. Res. Commun., 154, (1988) 868-875).
Increased or abnormal release of endothelin causes persistent vasoconstruction in the peripheral, renal and cerebral blood vessels, which may lead to illnesses. It has been reported in the literature that elevated plasma levels of endothelin were found in patients with hypertension, acute myocardial infarct, pulmonary hypertension, Raynaud's syndrome, atherosclerosis and in the airways of asthmatics (Japan J. Hypertension, 12, (1989) 79, J. Vascular Med. Biology 2, (1990) 207, J. Am. Med. Association 264, (1990) 2868).
Accordingly, substances which specifically inhibit the binding of endothelin to the receptor ought also to antagonize the various abovementioned physiological effects of endothelin and therefore be valuable drugs.
We have found that certain carboxylic acid derivatives are good inhibitors of endothelin receptors.
The invention relates to carboxylic acid derivatives of the formula I ##STR2## radical which can be hydrolyzed to COOH, and the other substituents have the following meanings: N(C.sub.1 -C.sub.4 -alkyl).sub.2, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkoxy or C.sub.1 -C.sub.4 -alkylthio; CR.sup.14 forms together with CR.sup.3 a 5- or 6-membered alkylene or alkenylene ring which can be substituted by one or two C.sub.1-4 -alkyl groups and in which in each case a methylene group can be replaced by oxygen, sulfur, --NH or --NC.sub.1-4 -alkyl; N(C.sub.1 -C.sub.4 -alkyl).sub.2, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkoxy, --NH--O--C.sub.1-4 -alkyl, C.sub.1 -C.sub.4 -alkylthio or CR.sup.3 is linked to CR.sup.14 as indicated above to give a 5- or 6-membered ring; following radicals: halogen, nitro, cyano, hydroxyl, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkoxy, phenoxy, C.sub.1 -C.sub.4 -alkylthio, amino, C.sub.1 -C.sub.4 -alkylamino or C.sub.1 -C.sub.4 -dialkylamino; or a direct linkage, a methylene, ethylene or ethenylene group, an oxygen or sulfur atom or an SO.sub.2 -, NH- or N-alkyl group, or C.sub.3 -C.sub.7 -cycloalkyl; C.sub.3 -C.sub.6 -alkynyl or C.sub.3 -C.sub.8 -cycloalkyl, where each of these radicals can be substituted one or more times by: halogen, nitro, cyano, C.sub.1 -C.sub.4 -alkoxy, C.sub.3 -C.sub.6 -alkenyloxy, C.sub.3 -C.sub.6 -alkynyloxy, C.sub.1 -C.sub.4 -alkylthio, C.sub.1 -C.sub.4 -haloalkoxy, C.sub.1 -C.sub.4 -alkylcarbonyl, C.sub.1 -C.sub.4 -alkoxycarbonyl, C.sub.3-8 -alkylcarbonylalkyl, C.sub.1 -C.sub.4 -alkylamino, di-C.sub.1 -C.sub.4 -alkylamino, phenyl or phenyl or phenoxy which is substituted one or more times, eg. one to three times, by halogen, mitro, cyano, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkoxy or C.sub.1 -C.sub.4 -alkylthio; following radicals: halogen, nitro, cyano, hydroxyl, amino, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkoxy, phenoxy, C.sub.1 -C.sub.4 -alkylthio, C.sub.1 -C.sub.4 -alkylamino, C.sub.1 -C.sub.4 -dialkylamino, nitrogen atoms and/or one sulfur or oxygen atom, which can carry one to four halogen atoms and/or one or two of the following radicals: C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkoxy, C.sub.1 -

REFERENCES:
Raschack et al. (J. Cardiovasc. Pharmacol. (1995), 26 (Suppl. 3), S397-S399.
Riechers et al. (J. Med. Chem. (1996), 39(11), 2123-8).

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