Acetone → N2-{4-[4-amino-1-(3-piperidyl)-1H-pyrazolo[3,4-d]pyrimidin-3-yl]phenyl}-5,7-dimethyl-1,3-benzoxazol-2-amine acetate

HRID 897898Notes

Reaction equation

HRID 897898 reaction equation
[NH2:1][C:2]1[N:7]=[CH:6][N:5]=[C:4]2[N:8]([CH:29]3[CH2:34][CH2:33][CH2:32][N:31](C([O:37][C:38]([CH3:41])(C)C)=O)[CH2:30]3)[N:9]=[C:10]([C:11]3[CH:16]=[CH:15][C:14]([NH:17][C:18]4[O:19][C:20]5[C:26]([CH3:27])=[CH:25][C:24]([CH3:28])=[CH:23][C:21]=5[N:22]=4)=[CH:13][CH:12]=3)[C:3]=12.Cl.CC(C)=[O:45]>>[C:38]([OH:45])(=[O:37])[CH3:41].[NH2:1][C:2]1[N:7]=[CH:6][N:5]=[C:4]2[N:8]([CH:29]3[CH2:34][CH2:33][CH2:32][NH:31][CH2:30]3)[N:9]=[C:10]([C:11]3[CH:12]=[CH:13][C:14]([NH:17][C:18]4[O:19][C:20]5[C:26]([CH3:27])=[CH:25][C:24]([CH3:28])=[CH:23][C:21]=5[N:22]=4)=[CH:15][CH:16]=3)[C:3]=12

Participants

4

Reactant 3

HCID 180AcetoneHCID 313Hydrochloric AcidHCID 22346853tert-butyl 3-(4-amino-3-{4-[(5,7-dimethyl-1,3-benzoxazol-2-yl)amino]phenyl}-1H-pyrazolo[3,4-d]pyrimidin-1-yl)-1-piperidinecarboxylate

Product 1

HCID 22347309N2-{4-[4-amino-1-(3-piperidyl)-1H-pyrazolo[3,4-d]pyrimidin-3-yl]phenyl}-5,7-dimethyl-1,3-benzoxazol-2-amine acetate

Conditions

Temperature
45 °C

Procedure

To a mixture of tert-butyl 3-(4-amino-3-{4-[(5,7-dimethyl-1,3-benzoxazol-2-yl)amino]phenyl}-1H-pyrazolo[3,4-d]pyrimidin-1-yl)-1-piperidinecarboxylate (0.28 g, 0.00051 mol) in acetone (10 mL) was added an 6N aqueous solution of hydrogen chloride (3 mL) at room temperature. The mixture was stirred at 45° C. for 1 hour. The solvent was removed, and the mixture was basified with an aqueous 5N sodium hydroxide solution. The aqueous layer was extracted with dichloromethane (3×80 mL). The solvent was removed under reduced pressure, and the residue was purified by RP-HPLC (Hypersilprep HS C18, 8 μm, 250×21.1 mm; 5%-100% over 20 min with 0.1 M ammonium acetate, 21 mL/min) to yield N2-{4-[4-amino-1-(3-piperidyl)-1H-pyrazolo[3,4-d]pyrimidin-3-yl]phenyl}-5,7-dimethyl-1,3-benzoxazol-2-amine acetate (0.06 g, 0.00012 mol). 1H NMR (DMSO-d6, 400 MHz) δ 10.85 (s, 1H), 8.22 (s, 1H), 7.95 (d, 2H), 7.65 (d, 2H), 7.05 (s, 1H), 6.80 (s, 1H), 4.75 (br, 1H), 3.15 (br, 2H), 2.95 (m, 2H), 2.40 (s, 3H), 2.35 (s, 3H), 2.05 (br, 1H), 2.00 (br, 11), 1.90 (s, 3H), 1.80 (br, 1H), 1.60 (br, 1H). RP-HPLC (Delta Pak C18, 5 μm, 300 A, 15 cm; 5%-95% acetonitrile-0.1M ammonium acetate over 10 min, 1 mL/min) Rt 9.4 min. MS: MH+ 455

Workup

  1. customThe solvent was removed
  2. extractionThe aqueous layer was extracted with dichloromethane (3×80 mL)
  3. customThe solvent was removed under reduced pressure
  4. customthe residue was purified by RP-HPLC (Hypersilprep HS C18, 8 μm, 250×21.1 mm; 5%-100% over 20 min with 0.1 M ammonium acetate, 21 mL/min)

Sources & evidence

ORD record
ord-b5b0f98d7c0e41a386368f1109b8b318
Source dataset
uspto-grants-2005_07
Patent number
US06921763B2

Reaction notes

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