反应详情

To a solution of ethyl 4-(2-tert-butoxy-2-oxoethylidene)cyclohexanecarboxylate (5.3 g, 21 mmol) in CH2Cl2 (30 ml) was added TFA (30 ml). The solution was stirred at room temperature overnight. The solution was concentrated in vacuo to afford 6 g of product as colorless oil, which was used directly for next step without further purification.

1. concentrationThe solution was concentrated in vacuo