Dicyclohexylcarbodiimide → (RS)-1-cyano-1-(6-phenoxypyrid-2-yl)methyl (1RS, trans)-3-(2-cyclohexylpyrimidine-5-yl)-2,2-dimethylcyclopropane carboxylate

Participants

Reaction Steps

Dicyclohexylcarbodimide (118 mg) was added to a stirred mixture of (±)-trans-3-(2-cyclohexylpyrimidin-5-yl)-2,2-dimethylcyclopropane carboxylate (150 mg), 1-cyano-1-(6-phenoxypyrid-2-yl)methanol (130 mg), 4-dimethylaminopyridine (5 mg) and dichloromethane (5 cm3) and the mixture stirred at the ambient temperature for 7 hours, and kept for a further 16 hours without stirring. The product was isolated by filtering through a silica column, eluting first with dichloromethane and then with a mixture of dichloromethane (20 parts by volume) and ethyl acetate (1 part by volume) to yield (RS)-1-cyano-1-(6-phenoxypyrid-2-yl)methyl (1RS, trans)-3-(2-cyclohexylpyrimidine-5-yl)-2,2-dimethylcyclopropane carboxylate, (248 mg) identified by n.m.r. as a 1:1 mixture of the two pairs of enantiomeric diastereomers.

Provenance & Evidence