tert-butyl 4-carbamoyl-5-(4-fluorophenyl)-1H-pyrazole-1-carboxylate 、
劳森试剂 在
乙酸乙酯 、
乙醚 、
tert-butyl 4-carbamothioyl-3-(4-fluorophenyl)-1H-pyrazole-1-carboxylate 作用下,
以
四氢呋喃 为溶剂,
反应 1.0h,
以to give a mixture (415 mg, 55%) of tert-butyl 4-carbamothioyl-5-(4-fluorophenyl)-1H-pyrazole-1-carboxylate and tert-butyl 4-carbamothioyl-3-(4-fluorophenyl)-1H-pyrazole-1-carboxylate as a yellow powder的产率得到tert-butyl 4-carbamothioyl-5-(4-fluorophenyl)-1H-pyrazole-1-carboxylate