| titleOfInvention |
Process for the preparation of (4s) -4- (4-cyano-2-methoxyphenyl) -5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carboxamide and for recovery of (4s) -4- (4-cyano-2-methoxyphenyl) -5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carboxamide by electrochemical methods |
| abstract |
The present invention relates to a novel process for the preparation of (4S) -4- (4-cyano-2-methoxyphenyl) -5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine -3-carboxamide of the formula (I) and for the recovery of (4S) -4- (4-cyano-2-methoxyphenyl) -5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6 -naphthyridine-3-carboxamide of the formula (I) (I), from (4R) -4- (4-cyano-2-methoxyphenyl) -5-ethoxy-2,8-dimethyl-1,4-dihydro -1,6-naphthyridine-3-carboxamide of the formula ent- (I) ent- (I). |