14-[6-amino-hexyl]-6,7,9,10,13,14,15,16,18,19,21,22-dodecahydro-12H-5,8,11,17,20,23-hexaoxa-14-aza-benzocyclohenicosene-2,3-dicarboxylic acid dimethyl ester dihydrochloride 、
N,N'-bis-Boc-S-methyl-isothiourea 在
三乙胺 作用下,
以
氯仿 为溶剂,
反应 48.33h,
以51%的产率得到14-[6-[2,3-di-(tert-butyloxycarbonyl)-guanidino]-hexyl]-6,7,9,10,13,14,15,16,18,19,21,22-dodecahydro-12H-5,8,11,17,20,23-hexaoxa-14-aza-benzocycloheneicosene-2,3-dicarboxylic acid dimethyl ester