反应详情

Under a nitrogen atmosphere, 0.49 g of N,N-dicyclohexylcarbodiimide was added to a mixture of 0.50 g of 4-methoxy-2,3,5,6-tetrafluorobenzyl alcohol, 0.43 g of (1R)-trans-3-(2-cyano-1-propenyl)-2,2-dimethylcyclopropanecarboxylic acid, 0.087 g of 4-dimethylaminopyridine and 7 ml of anhydrous dichloromethane, and the mixture was stirred at room temperature for 3 hours. Thereafter, the reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was subjected to silica gel column chromatography to obtain 0.62 g of 4-methoxy-2,3,5,6-tetrafluorobenzyl (1R) trans-3-(2-cyano-1-propenyl)-2,2-dimethylcyclopropanecarboxylate represented by the following formula:

1. filtrationThereafter, the reaction mixture was filtered
2. concentrationthe filtrate was concentrated under reduced pressure