HCID 15004124, compound → HCID 15004130, compound

Participants

Reaction Steps

In 20 ml of isopropyl ether saturated with water was dissolved 267 mg of bis(propionyloxymethyl) 1,4-dihydro-2,6-dimethyl-1-methoxymethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylate obtained in Example 12, and 50 mg of Lipase B was added thereto, followed by stirring at 0° to 5° C. for 8 hours. Any insoluble matter was removed by filtration and washed with dichloromethane. The filtrate was concentrated under reduced pressure, and the residue was subjected to silica gel column chromatography (ethyl acetate/hexane=l/2) to obtain 155 mg (yield: 71%) of (S)-1,4-dihydro-2,6-dimethyl-l-methoxymethyl-(3-nitrophenyl)-5-propionyloxymethoxycarbonyl-3-pyridinecarboxylic acid as a pale yellow crystal.

Provenance & Evidence