(E)-4-(2-Chloro-phenyl)-4-oxo-but-2-enoic acid (E)-3-benzo[b]thiophen-2-yl-allyl ester                                                                                                                                                                                              以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 14.0h,
                                                                                                                生成                                                 (3aR,4S,4aS,10aS)-4-(2-Chloro-benzoyl)-3a,4,4a,10a-tetrahydro-1H-2-oxa-9-thia-cyclopenta[b]fluoren-3-one   、                                                                                             (3aS,4R,10aR)-4-(2-Chloro-benzoyl)-3a,4,10,10a-tetrahydro-1H-2-oxa-9-thia-cyclopenta[b]fluoren-3-one