反应详情

温度

-78 °C

A solution of trans 1-{3-[(benzyloxy)methyl]cyclobutyl}-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine (0.244 g, 0.00051 mol) in dichloromethane (10 mL) was cooled to −78° C. and a solution of 1.0 M boron trichloride in dichloromethane (1.53 mL, 0.00153 mol) was added dropwise, keeping the temperature less than −70° C. The reaction mixture was stirred seven hours at −78° C., after which time a 8 M solution of ammonia in methanol (1.5 mL) was added. The solvent was removed in vacuo. The residue was purified by flash column chromatography on silica using dichloromethane/methanol (93:7). The solvent was removed in vacuo to give to give trans 3-[4-amino-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]cyclobutylmethanol (0.192 g, 0.00049 mol) as a white solid.

1. customthe temperature less than −70° C
2. customThe solvent was removed in vacuo
3. customThe residue was purified by flash column chromatography on silica
4. customThe solvent was removed in vacuo
5. customto give