Tert-butyl 3-[6-[tert-butyl(dimethyl)silyl]oxy-1-[(2-methylpropan-2-yl)oxycarbonyl]indol-2-yl]-5-(2-tert-butylsilyloxypropan-2-yl)thieno[3,2-c]pyrazole-1-carboxylate 、
四丁基氟化铵 在
乙酸乙酯 、
magnesium sulfate 、 silica gel 、
2-(1-tert-butoxycarbonyl-5-hydroxymethyl-1H-thieno[3,2-c]pyrazol-3-yl)-6-hydroxyindole-1-carboxylic acid tert-butyl ester 作用下,
以
四氢呋喃 、
水 为溶剂,
以to produce 2-(1-tert-butoxycarbonyl-5-hydroxymethyl-1H-thieno[3,2-c]pyrazol-3-yl)-6-hydroxy-indole-1-carboxylic acid tert-butyl ester [1.5 g (66%, Intermediate (76)]的产率得到2-(1-tert-butoxycarbonyl-5-hydroxymethyl-1H-thieno[3,2-c]pyrazol-3-yl)-6-hydroxyindole-1-carboxylic acid tert-butyl ester