rel-(1S,3aR,7aS)-1-<2-<<(1,1-Dimethylethyl)dimethylsilyl>oxy>-1(S)-methylethyl>-3a-formyl-1,2,3,6,7,7a-hexahydro-4-<(2,5-dimethoxyphenyl)methyl>-3aH-indene                                                                                                                                                              在
                                                                                                                                                                                 acid-washed Dowex-50w resin                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 18.0h,
                                                                                                                生成                                                 (1S,6R,7R,8R)-2-(2,5-Dimethoxy-benzyl)-11-methoxy-8-methyl-10-oxa-tricyclo[5.4.2.0
1,6]tridec-2-ene