7-(2-bromoethoxy)-8-methyl-3-(4-methoxyphenyl)-4H-chromen-4-one   、                                                                                      
cytisine                                                                                                                                                              在
                                                                                                                                                                                 
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                                                        以75%的产率得到(1R,5S)-3-(2-{[8-methyl-3-(4-methoxyphenyl)-4-oxo-4H-chromen-7-yl]oxy}ethyl)-1,2,3,4,5,6-hexahydro-8H-1,5-methanepyrido[1,2-a][1,5]diazocin-8-one hydrochloride