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