(S)-2-(3,5-diamino-6-chloropyrazine-2-carboxamido)-3-phenylpropionic acid 、
(+/-)-1-(2-aminoethylamino)-3-(naphthylen-1-yloxy)propan-2-ol 、
1,2-二氢-2-异丁氧基喹啉-1-甲酸异丁酯 、 、
碳酸氢钠 在
乙醚 作用下,
以
二甲基亚砜 为溶剂,
反应 18.0h,
以There was thus obtained as solid product 3,5-diamino-6-chloro-N-{1-[N-β-(2-hydroxy-3-α-naphthyloxypropylamino)ethylcarbamoyl]-2-phenylethyl}pyrazine-2-carboxamide, m.p. 142°-146° C.的产率得到3,5-diamino-6-chloro-N-{1-[N-beta-(2-hydroxy-3-alpha-naphthyloxypropylamino)ethylcarbamoyl]-2-phenylethyl}pyrazine-2-carboxamide