Sodium hydride → HCID 13240342, compound

Participants

Reaction Steps

0.24 g (10 mmole) of sodium hydride was suspended in 10 ml of N,N-dimethylformamide, to which was added 2.45 g (12 mmole) of 3-(3,4-methylenedioxyphenyl)-5-pyrazolone with stirring at room temperature. After evolution of hydrogen had ceased, to this solution was added dropwise 10 ml of a solution of 5.87 g (10 mmole) of 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3-methoxycarbonylpyridine-5-carboxylic acid 6-tosyloxyhexyl ester in N,N-dimethylformamide, and the mixture was stirred and heated at 90° C. for an hour. The resultant reaction mixture was poured into 200 ml of ice water, and the separated solid was filtered off. This solid was recrystallized from ethyl acetate to obtain 3.21 g (yield 51.9%) of the 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3-methoxycarbonylpyridine-5-carboxylic acid 6-[5-(3,4-methylenedioxyphenyl)-3-pyrazolyloxy]hexyl ester.

Provenance & Evidence