Thioisobutyrimidic acid methyl ester; hydrochloride 、 (3'S,5RS)-5-[N-(6-amino-3-benzyloxycarbonylaminohexanoyl)-N-methylamino]-5,6-dihydro-2-ureidopyrimid-4(1H)-one hydrochloride 在
N,N-二异丙基乙胺 作用下,
以
乙醇 为溶剂,
以44%的产率得到(3'S,5RS)-5-[N-[3-benzyloxycarbonylamino-6-(isobutyrimidoylamino)hexanoyl]-N-methylamino]-5,6-dihydro-2-ureidopyrimid-4(1H)-one