1-(tert-butoxycarbonylamino-methyl)-6,7-dimethoxy-isoquinoline-4-carboxylic acid 、 diethylphosphoryl cyanide 、
2-甲氧基乙胺 以to give [6,7-dimethoxy-4-(2-methoxy-ethylcarbamoyl)-isoquinolin-1-ylmethyl]-carbamic acid tert-butyl ester (45 mg, 49%)的产率得到[6,7-dimethoxy-4-(2-methoxy-ethylcarbamoyl)-isoquinolin-1-ylmethyl]-carbamic acid tert-butyl ester