Hydrogen Bromide → HCID 19980425, compound

Participants

Reaction Steps

5 ml of a solution of hydrobromic acid in 30% acetic acid are added at 25° C. and under inert atmosphere to a solution of the less polar diastereoisomer of trans-2-(2-phenyl-1-cyclopropyl)-3-carboethoxy-5-cyano-6-methyl-4-(m-nitrophenyl)-1,4-dihydropyridine (0.5 g) in chloroform (5 ml). After 1 1/5 hours the mixture is poured into water (50 ml) and extracted with diethyl ether (25 ml). The phases are separated and the organic one is washed with a 5% NaHCO3 aqueous solution (3×50 ml) and water (2×50 ml), dried on sodium sulphate, filtered and the solvent is evaporated under reduced pressure. 500 mg of the more polar diastereoisomer of 2-(3-phenyl-3-bromopropyl)-3-carboethoxy-5-cyano-6-methyl -4-(m-nitrophenyl)-1,4-dihydropyridine are obtained as an amorphous solid.

Provenance & Evidence