Dimethyl Sulfoxide → 7-((Methylamino)methyl)-2-(4-phenoxyphenyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidine-3-carboxamide

HRID 64299Notes

Reaction equation

[CH3:1][NH:2][CH2:3][CH:4]1[N:9]2[N:10]=[C:11]([C:15]3[CH:20]=[CH:19][C:18]([O:21][C:22]4[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=4)=[CH:17][CH:16]=3)[C:12]([C:13]#[N:14])=[C:8]2[NH:7][CH2:6][CH2:5]1.CS(C)=[O:30].[OH-].[Na+].OO>CCO>[CH3:1][NH:2][CH2:3][CH:4]1[N:9]2[N:10]=[C:11]([C:15]3[CH:20]=[CH:19][C:18]([O:21][C:22]4[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=4)=[CH:17][CH:16]=3)[C:12]([C:13]([NH2:14])=[O:30])=[C:8]2[NH:7][CH2:6][CH2:5]1

Participants

Conditions

Temperature: 60 °C

Procedure

To a solution of 7-((methylamino)methyl)-2-(4-phenoxyphenyl)-4,5,6,7-tetrahydro pyrazolo[1,5-a]pyrimidine-3-carbonitrile (20 mg, 0.0557 mmol) in 2 mL of EtOH was added 1 mL of DMSO, 0.5 mL of NaOH (5N) and 0.5 mL of H2O2 (30% solution). The reaction mixture was stirred at 60° C. for 1 hr. Then the mixture was concentrated to remove EtOH. The residue was partitioned between water (20 mL) and EA (20 mL). The EA layer was concentrated to give the product as a white solid (10 mg, yield: 48%). 1H NMR (400 MHz, DMSO-d6) δ 7.51 (d, J=8 Hz, 2H), 7.47-7.40 (m, 2H), 7.19 (t, J=7.6 Hz, 1H), 7.11-7.04 (m, 4H), 6.61 (s, 1H), 4.26-4.16 (m, 1H), 3.34-3.27 (m, 2H), 2.97-2.95 (m, 1H), 2.83-2.77 (m, 1H), 2.33 (s, 3H), 2.08-2.02 (m, 2H). MS (ESI) m/e [M+1]+378.0.

Workup

concentrationThen the mixture was concentrated
customto remove EtOH
customThe residue was partitioned between water (20 mL) and EA (20 mL)
concentrationThe EA layer was concentrated

Sources & evidence

ORD record: ord-5de60cbe2c1f4ed687aa76a24b6ac6c5
Source dataset: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09447106B2

Reaction notes

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