1,2,6-Tri-tert-butyl-4,4-bis(trifluormethyl)-3-azatricyclo<3.1.0.02,6>hexan-3,5-dicarbonsaeure-3-ethylester-5-tert-butylester 以
苯 为溶剂,
反应 0.25h,
生成
(1R,6S)-1,7,8-Tri-tert-butyl-3-ethoxy-5,5-bis-trifluoromethyl-2-oxa-4-aza-bicyclo[4.2.0]octa-3,7-diene-6-carboxylic acid tert-butyl ester