1,7,8-Tri-tert-butyl-3-(2,2-dimethylpropyl)-5-phenyl-2-oxa-4-azabicyclo<4.2.0>octa-3,7-dien-6-carbonsaeure-methylester 在
三氟乙酸 作用下,
以
氯仿 为溶剂,
以84%的产率得到(1α,3β,4α)-1,5,6-Tri-tert-butyl-2-(3,3-dimethylbutyryl)-3-phenyl-2-azabicyclo<2.2.0>hex-5-en-4-carbonsaeure-methylester