反应详情

Potassium tert-butoxide (1 M in THF; 0.73 ml, 0.73 mmol) and 2,2,2-trifluoroethanol (2 ml) were stirred at room temperature and to this mixture was added 6-chloro-9-(4-chlorophenyl)-8-(2,4-dichlorophenyl)-9H-purine I-(1A-1)d (100 mg, 0.24 mmol). The reaction mixture was stirred at room temperature for 3 days then quenched with H2O and diluted with chloroform. The organic layer was washed with brine, dried (Na2SO4), filtered, and concentrated under reduced pressure. The crude product was purified by preparative TLC using 20% ethyl acetate/hexanes as the eluant to give title compound 5A-1 (20 mg, 17%): +ACPI MS (M+1) 473.1; 1H NMR: (400 MHz, CD3OD): δ 8.58 (s, 1H), 7.64 (d, 1H), 7.57 (d, 1H), 7.50–7.41 (m, 3H), 7.36 (d, 2H), 5.23 (q, 2H).

1. customthen quenched with H2O
2. additiondiluted with chloroform
3. washThe organic layer was washed with brine
4. dry with materialdried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customThe crude product was purified by preparative TLC