2-[5'-aminomethyl-5-(5-carbamimidoyl-1H-benzimidazol-2-yl)-6,2'-dihydroxy-biphenyl-3-yl]-2-methyl-propionic acid ditrifluoroacetic acid salt 、
二-O-乙酰基-L-酒石酸酐 在
三乙胺 作用下,
以
异丁酰胺 为溶剂,
反应 1.17h,
以39%的产率得到N-[3'-(5-carbamimidoyl-1H-benzimidazol-2-yl)-5'-(1-carboxy-1-methyl-ethyl)-6,2'-dihydroxy-biphenyl-3-ylmethyl]-2R,3R-dihydroxy-succinamic acid hydrochloride