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- W2031313977 abstract "The ATP-sensitive potassium channel (KATP) openers are of considerable interest as myocardial protecting agents. However, there exists a narrow window of safety for the use of first-generation compounds as antiischemic agents due to their powerful peripheral vasodilating effects, which can result in underperfusion of the area already at risk. We have recently disclosed the discovery of benzopyranylcyanoguanidine type KATP openers (BMS-180448) which are more selective for the ischemic myocardium compared to the first-generation compounds. This publication deals with structure-activity relationships for the antiischemic activity of the lead compound 8. The presence of an electron-withdrawing group at C6, an sp3 center at C4, and a gem-dimethyl group at C2 appears to be essential for antiischemic activity. Cyanoguanidine can be replaced with a urea moiety. The results reported here support the hypothesis that distinct structure-activity relationships exist for antiischemic and vasorelaxant activities of compounds related to 8 and cromakalim. The trifluoromethyl analog 10 is 550-fold more selective in vitro for the ischemic myocardium compared to the first-generation agent cromakalim. The reasons for the selectivity of these compounds for the ischemic myocardium are not clear at the present time. They may be related to the existence of receptor subtypes in smooth muscle and the myocardium." @default.
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- W2031313977 date "1995-05-01" @default.
- W2031313977 modified "2023-10-16" @default.
- W2031313977 title "Cardioselective Antiischemic ATP-Sensitive Potassium Channel Openers. 2. Structure-Activity Studies on Benzopyranylcyanoguanidines; Modification of the Benzopyran Ring" @default.
- W2031313977 doi "https://doi.org/10.1021/jm00011a016" @default.
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