反应详情

A mixture of tetrakis(triphenylphosphine)palladium(0) (0.04 g, 0.03 mmol), 3-iodo-1H-pyrazolo[3,4-d]pyrimidin-4-amine (0.30 g, 1.14 mmol) and dimethyl sulfoxide (3 mL) was stirred at ambient temperature in the dark for 2 minutes and cooled to 0° C. A solution of 2,4a-dihydro-1aH-cyclopenta[b]oxirene (0.14 g, 1.72 mmol) in tetrahydrofuran (3 mL) was added into the mixture at 0° C. and stirred at 0° C. for 3 hours. The mixture was stirred at ambient temperature overnight and purified by preparative HPLC to yield 4-(4-amino-3-iodo-1H-pyrazolo[3,4-d]pyrimidin-1-yl)-2-cyclopenten-1-ol (0.24 g, 0.70 mmol) as a white solid: RP-HPLC (Hitachi HPLC, Hypersil C18, 5 μm, 100 A, 250×4.6 mm; 25%-100% acetonitrile-0.05M ammonium acetate over 10 min, 1 mL/min) Rt 4.23 min. MS: MH+ 344.

1. temperaturecooled to 0° C
2. stirringstirred at 0° C. for 3 hours
3. stirringThe mixture was stirred at ambient temperature overnight
4. custompurified by preparative HPLC