pyridinium N-ethoxycarbonylmethylide   、                                                                                      
2-phenyl-2-(2,3-diphenyl-2-cyclopropenylidene)acetonitrile                                                                                                                                                                                              以
                                                                                         
苯                                                                                  为溶剂,
                                                                                                                                                    反应 42.0h,
                                                                                                                以57%的产率得到rac-ethyl (41R,5R,7R,11bR)-7-cyano-6,12-diphenyl-41,5,6,11b-tetrahydro-3H,7H-3,6,6a-(epimethanetriyl)benzo[f]pyrrolo[3,2,1-ij]quinoline-5-carboxylate