反应详情

To a cooled solution of (R)-3-iodo-1-(pyrrolidin-3-yl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine (4) (990 mg, 3.0 mmol), (E)-4-(cyclobutyl(methyl)amino)but-2-enoic acid (21) (871 mg, 3.0 mmol) and DIPEA (3.1 mL, 18 mmol) in DMF (15 mL) was added HBTU (1.74 g, 4.5 mmol). The resulting solution was stirred at RT overnight, then quenched with water. The layers were separated and the aqueous layer was extracted with 85% DCM/IPA(3×). The combined organic phase was dried over Na2SO4, filtered and concentrated. The residue was purified by flash chromatography to provided (R,E)-1-(3-(4-amino-3-iodo-1H-pyrazolo[3,4-d]pyrimidin-1-yl)pyrrolidin-1-yl)-4-(cyclobutyl(methyl)amino)but-2-en-1-one (22) (1.71 g, quant. yield) as a white solid. LC-MS (ESI): m/z (M+1) 482.0.

1. customquenched with water
2. customThe layers were separated
3. extractionthe aqueous layer was extracted with 85% DCM/IPA(3×)
4. dry with materialThe combined organic phase was dried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was purified by flash chromatography