Methyl iodide → (4r,7s)-2-(2-Chloro-phenyl)-1,7,8,8-tetramethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one

Participants

Reaction Steps

A solution of (4R,7S)-2-(2-chloro-phenyl)-7,8,8-trimethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (Intermediate 39; 151.5 mg, 0.5 mmol) and iodomethane (0.16 mL, 2.55 mmol) in N-methylpyrrolidine (1 mL) was heated at 100° C. in a sealed tube for 2 h. The reaction mixture was purified by preparative HPLC to give (4R,7S)-2-(2-chloro-phenyl)-1,7,8,8-tetramethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (106 mg, 67%) as an off-white solid. ES(+)-MS (M+H) 317.

Provenance & Evidence