(4R,7S)-1,7,8,8-tetramethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one 、
4-bromomethyl-3-trifluoromethyl-1-trityl-1H-pyrazole 在
40S 、
methanol-dichloromethane 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 4.5h,
以to give (4R,7S)-1,7,8,8-tetramethyl-2-(3-trifluoromethyl-1-trityl-1 H-pyrazol-4-ylmethyl)-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (420 mg, 58%) as a viscous golden orange oil的产率得到(4R,7S)-1,7,8,8-tetramethyl-2-(3-trifluoromethyl-1-trityl-1H-pyrazol-4-ylmethyl)-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one