甲醇 、
[(1R,2R,6S,8R)-2-bromo-6-methyl-9-oxo-11-oxatricyclo[6.2.1.01,6]undec-4-en-5-yl] trifluoromethanesulfonate 在
碘苯二乙酸 、 potassium hydroxide 作用下,
以75%的产率得到(2R,4R,4aS,5R,8aS)-5-bromo-4-hydroxy-3,3-dimethoxy-8a-methyl-1,3,4,5,6,8a-hexahydro-2H-2,4a-epoxynaphthalen-8-yl trifluoromethanesulfonate