(2Z)-3-Amino-2-butenenitrile → 4-(4-Cyano-2-methoxyphenyl)-2,6-dimethyl-5-(5-methyl-1,3,4-thiadiazol-2-yl)-1,4-dihydropyridine-3-carbonitrile

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Reaction Steps

150 mg (0.501 mmol) of the compound from example 25A and 41 mg (0.501 mmol) of 3-amino-crotononitrile are dissolved in 5 ml of isopropanol and stirred at the reflux temperature overnight. After cooling to room temperature, the volatile components are removed in a rotary evaporator, and the crude product is purified by preparative HPLC (eluent: acetonitrile/water with 0.1% formic acid, gradient 20:80→95:5). Crystallization from ethyl acetate/diethyl ether results in 30 mg (16% of theory) of the title compound.

Provenance & Evidence