Diisopropylethylamine → 6-(2,6-difluoro-3,5-dimethoxyphenyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazolo[3,4-d]pyrimidine

HRID 1778655Notes

Reaction equation

Cl[C:2]1[N:7]=[C:6]2[N:8]([CH:11]3[CH2:16][CH2:15][CH2:14][CH2:13][O:12]3)[N:9]=[CH:10][C:5]2=[CH:4][N:3]=1.[F:17][C:18]1[C:23]([O:24][CH3:25])=[CH:22][C:21]([O:26][CH3:27])=[C:20]([F:28])[C:19]=1B1OC(C)(C)C(C)(C)O1.C(N(C(C)C)CC)(C)C>O1CCOCC1.CC(C)([P](C(C)(C)C)([Pd][P](C(C)(C)C)(C(C)(C)C)C(C)(C)C)C(C)(C)C)C>[F:17][C:18]1[C:23]([O:24][CH3:25])=[CH:22][C:21]([O:26][CH3:27])=[C:20]([F:28])[C:19]=1[C:2]1[N:7]=[C:6]2[N:8]([CH:11]3[CH2:16][CH2:15][CH2:14][CH2:13][O:12]3)[N:9]=[CH:10][C:5]2=[CH:4][N:3]=1

Participants

Conditions

Temperature: 125 °C

Procedure

A mixture of 6-chloro-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazolo[3,4-d]pyrimidine (477 mg, 2.00 mmol), 2-(2,6-difluoro-3,5-dimethoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (600. mg, 2.00 mmol), bis(tri-t-butylphosphine)palladium (150.0 mg, 0.300 mmol) and diisopropylethylamine (0.700 mL, 4.02 mmol) in 1,4-dioxane (20 mL) was degassed and recharged with nitrogen for three times. The mixture was stirred at 125° C. overnight. The solvent was removed under reduced pressure. The residue was purified by flash chromatography on a silica gel column with ethyl acetate in hexanes (gradient: 0-50%) to afford the desired product (0.30 g, 40%). LCMS (M+H)+=377.2.

Workup

customwas degassed
customThe solvent was removed under reduced pressure
customThe residue was purified by flash chromatography on a silica gel column with ethyl acetate in hexanes (gradient: 0-50%)

Sources & evidence

ORD record: ord-74009fdd83c74035982d037288c16e36
Source dataset: uspto-grants-2016_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09266892B2

Reaction notes

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