UN PROCEDIMIENTO PARA LA PREPARACION DE UNA 1,4-DIHIDROPIRI-DINA

摘要

Compounds of the formula: (I) where R is an optionally substituted aryl or heteroaryl group; R1 and R2 are each independently C1-C4 alkyl or 2-methoxyethyl; and Y is -(CH2)n- where n is 2, 3 or 4, -CH2CH(CH3)- or -Ch2C(CH3)2-; and their pharmaceutically acceptable salts. The compounds have utility as anti-ischaemic and antihypertensive agents and as synthetic intermediates to other dihydropyridine calcium antagonists.