5-(Tert-butyl-dimethyl-silanyloxymethyl)-3-iodo-thieno[3,2-c]pyrazole-1-carboxylic acid tert-butyl ester 、
四丁基氟化铵 在
silica gel 、
5-hydroxymethyl-3-iodothieno[3,2-c]pyrazole-1-carboxylic acid tert-butyl ester 作用下,
以
四氢呋喃 为溶剂,
反应 1.0h,
以to afford 5-hydroxymethyl-3-iodo-thieno[3,2-c]pyrazole-1-carboxylic acid tert-butyl ester [230 mg, 73%, Intermediate (80)] as a white powder的产率得到5-hydroxymethyl-3-iodothieno[3,2-c]pyrazole-1-carboxylic acid tert-butyl ester