PROCESS FOR OBTAINING DIHYDROPYRIDINE DERIVATIVES

Dihydropyridine anti-ischaemic and antihypertensive agents of the formula: (I) where Y is -(CH2)2- or -(CH2)3-; R is aryl or heteroaryl; R1 and R2 are each independently C1-C4 alkyl or 2-methoxyethyl; and R3 and R4 are each independently C1-C4 alkyl or aryl-(C1-C4 alkyl); or R3 and R4 taken together...

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Hauptverfasser: CAMPBELL S.F, STUBBS J.K, CROSS P.E
Format: Patent
Sprache:eng
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Zusammenfassung:Dihydropyridine anti-ischaemic and antihypertensive agents of the formula: (I) where Y is -(CH2)2- or -(CH2)3-; R is aryl or heteroaryl; R1 and R2 are each independently C1-C4 alkyl or 2-methoxyethyl; and R3 and R4 are each independently C1-C4 alkyl or aryl-(C1-C4 alkyl); or R3 and R4 taken together with the nitrogen atom to which they are attached represent a group of the formula: where R5 is C1-C4 alkyl, aryl, aryl-(C1-C4 alkyl), benzhydryl; 2-methoxyethyl, 2-(N,N-di[C1-C4 alkyl]amino) ethyl, or cyclopropylmethyl; their pharmaceutically acceptable acid addition salts, processes for the preparation of the compounds, and pharmaceutical compositions containing them.