反应详情

A solution of 23 g of dicyclohexylcarbodiimide in 50 ml of CH2Cl2 is added at room temperature to a mixture of 16 g of 1-cyano-3-methyl-cyclohexanecarboxylic acid, 25 g of 4'-hexylbiphenyl-4-ol, 1.2 g of 4-diethylaminopyridine and 200 ml of methylene chloride, and the mixture is stirred for 2 hours. Customary working up and separation by column chromatography (silica gel/toluene) and recrystallization gives the pure product 4'-hexylbiphenyl-4-yl 1-cyano-3-methylcyclohex-anecarboxylate, m.p. 51°.

1. customseparation
2. customby column chromatography (silica gel/toluene) and recrystallization