反应详情

To a solution of 341 mg of triphenylphosphine in 5 ml of anhydrous tetrahydrofuran was added dropwise 226 mg of diethyl azodicarboxylate and the mixture was stirred under cooling with ice for 20 minutes. To this solution was added a solution of 373 mg of the compound obtained in Example 3 in 3 ml of anhydrous tetrahydrofuran, and the mixture was stirred at room temperature overnight.

1. temperatureunder cooling with ice for 20 minutes
2. stirringthe mixture was stirred at room temperature overnight