N-甲基芸香碱   、                                                                                      
5-[(E)-2-cyclopropylvinyl]-1,2,3-trimethoxybenzene                                                                                                                                                                                              以
                                                                                         neat (no solvent)                                                                                  为溶剂,
                                                                                                                                                    反应 16.0h,
                                                                                                                以4%的产率得到(1RS,2RS,2aRS,10aSR)-1-cyclopropyl-2-(3,4,5-trimethoxyphenyl)-10,10,6-trimethyl-1,2,2a,4,10,10a-hexahydro-3H-cyclobuta[4,5]pyrano[3,2-c]quinolin-3-one