Analogifremgangsmaade for the preparation of 1,4-dihydropyridine derivatives or pharmaceutically acceptable acid addition salts thereof, and 1,4-dihydropyridine derivatives for use as starting material in the process

摘要

1,4-Dihydropyridine derivatives of the formula: IMAGE (I) and their pharmaceutically acceptable acid addition salts; where R is aryl or heteroaryl; R1 and R2 are each independently C1-C4 alkyl or 2-methoxyethyl; Y is -(CH2)2-, -(CH2)3-, -CH2CH(CH3)- or -CH2C(CH3)2-; R3 is hydrogen or an organic substituent are useful in treating or preventing heart conditions or hypertension.