{[4-(4'-hydroxy-2',6'-dimethyl-biphenyl-3-sulfonyl)-5-methylsulfanyl-thiophen-2-yl]-imino-methyl}-carbamic acid tert-butyl ester 、
溴乙酸叔丁酯 在
potassium carbonate 作用下,
以
丙酮 为溶剂,
反应 18.0h,
以28%的产率得到{3'-[5-(tert-butoxycarbonylamino-imino-methyl)-2-methylsulfanyl-thiophene-3-sulfonyl]-2,6-dimethyl-biphenyl-4-yloxy}-acetic acid tert-butyl ester