{[4-(2'-Amino-6'-methyl-biphenyl-3-sulfonyl)-5-methylsulfanyl-thiophen-2-yl]-imino-methyl}-carbamic acid tert-butyl ester 、
丁二酸单乙酯酰氯 以
四氢呋喃 、
乙酸乙酯 为溶剂,
以30%的产率得到N-{3'-[5-(tert-Butoxycarbonylamino-imino-methyl)-2-methylsulfanyl-thiophene-3-sulfonyl]-6-methyl-biphenyl-2-yl}-succinamic acid ethyl ester