4-[4-(2-Dimethylaminoethoxy)phenyl]butylamine 、
tert-butyl (3,5-diamino-6-chloropyrazine-2-carboxamido)(methylthio)methylene carbamate 在
silica gel 、
chloroform methanol 作用下,
以
Triethylamine tetrahydrofuran 为溶剂,
反应 48.0h,
以to provide the guanidine 65 (0.3 g, 60%) as a yellow solid的产率得到N-tert-Butyloxycarbonyl-N'-(3,5-diamino-6-chloropyrazine-2-carbonyl)-N''-{4-[4-(2-dimethylaminoethoxy)phenyl]butyl}guanidine