2-Chloro-1-propyl-8-[1-(3-trifluoromethyl-benzyl)-1H-pyrazol-4-yl]-1,7-dihydro-purin-6-one → 2-Ethyl-1-propyl-8-[1-(3-trifluoromethyl-benzyl)-1H-pyrazol-4-yl]-1,7-dihydro-purin-6-one

HRID 925566Notes

Reaction equation

Cl[C:2]1[N:3]([CH2:28][CH2:29][CH3:30])[C:4](=[O:27])[C:5]2[NH:6][C:7]([C:11]3[CH:12]=[N:13][N:14]([CH2:16][C:17]4[CH:22]=[CH:21][CH:20]=[C:19]([C:23]([F:26])([F:25])[F:24])[CH:18]=4)[CH:15]=3)=[N:8][C:9]=2[N:10]=1.[CH2:31]([Mg]Br)[CH3:32]>O1CCOCC1.[Cl-].[Zn+2].[Cl-].C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH2:31]([C:2]1[N:3]([CH2:28][CH2:29][CH3:30])[C:4](=[O:27])[C:5]2[NH:6][C:7]([C:11]3[CH:12]=[N:13][N:14]([CH2:16][C:17]4[CH:22]=[CH:21][CH:20]=[C:19]([C:23]([F:26])([F:25])[F:24])[CH:18]=4)[CH:15]=3)=[N:8][C:9]=2[N:10]=1)[CH3:32]

Participants

Conditions

Temperature: 50 °C

Procedure

To a solution of 2-Chloro-1-propyl-8-[1-(3-trifluoromethyl-benzyl)-1H-pyrazol-4-yl]-1,7-dihydro-purin-6-one (0.1 g, 0.239 mmol) in dioxane (5 ml) under argon was added ethyl magnesium bromide (0.05 g, 1.146 mmol, 1M solution) and 1M zinc chloride (0.031 g, 2.39 mmol, 1M). To this solution Pd(PPh3)4 (0.026 g, 0.0239 mmol) was added. The reaction mixture was heated at 50° C. for overnight. The reaction mixture was filtered through celite pad and the solvents were removed under reduced pressure. The residue was purified by column chromatography to obtain 2-Ethyl-1-propyl-8-[1-(3-trifluoromethyl-benzyl)-1H-pyrazol-4-yl]-1,7-dihydro-purin-6-one (0.01 g, 10%) as a white solid.

Workup

filtrationThe reaction mixture was filtered through celite pad
customthe solvents were removed under reduced pressure
customThe residue was purified by column chromatography

Sources & evidence

ORD record: ord-0e21690cdb3849b0bc62b54c5036184b
Source dataset: uspto-grants-2016_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09284316B2

Reaction notes

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