甲醇 、 rac-tert-butyl (5R,6S,10S,11S)-7-oxo-5a,6,7,10,10a,11-hexahydro-5H-5,11-epimino-6,10-ethenocyclohepta[b]naphthalene-12-carboxylate 反应 3.5h,
以95%的产率得到rac-tert-butyl (1R,1aS,4R,9S,9bR)-1-(2-methoxy-2-oxoethyl)-1a,3a,4,9,9a,9b-hexahydro-1H-4,9-epiminocyclopropa[a]anthracene-10-carboxylate