sodium 4-cyano-10-hydroxy-6-hydroxymethyl-3,12-imino-7-methoxy-13-methyl-1,2,3,4,6,11,11a,12-octahydroazepino<1,2-b>isoquinoline-1-carboxylate 、
原甲酸三甲酯 在
thallium(III) nitrate 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
以74.4%的产率得到sodium 5-cyano-8,8-dimethoxy-7-hydroxymethyl-13-methyl-11-oxo-1,2,3,4,5,7,8,11,12,12a-decahydro-1,4-iminoazepino<1,2-b>isoquinoline-2-carboxylate