N-bromobutanimide → 7-bromo-9-pentyl-3-[3-(4-phenyl-1H-pyrazol-1-yl)propyl]-6,9-dihydro-5H-[1,2,4]triazolo[4,3-a]purin-5-one

HRID 1787825Notes

Reaction equation

[CH2:1]([N:6]1[C:14]2[N:13]=[CH:12][NH:11][C:10]=2[C:9](=[O:15])[N:8]2[C:16]([CH2:19][CH2:20][CH2:21][N:22]3[CH:26]=[C:25]([C:27]4[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=4)[CH:24]=[N:23]3)=[N:17][N:18]=[C:7]12)[CH2:2][CH2:3][CH2:4][CH3:5].[Br:33]N1C(=O)CCC1=O>C1COCC1>[Br:33][C:12]1[NH:11][C:10]2[C:9](=[O:15])[N:8]3[C:16]([CH2:19][CH2:20][CH2:21][N:22]4[CH:26]=[C:25]([C:27]5[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=5)[CH:24]=[N:23]4)=[N:17][N:18]=[C:7]3[N:6]([CH2:1][CH2:2][CH2:3][CH2:4][CH3:5])[C:14]=2[N:13]=1

Participants

Conditions

Temperature: 70 °C

Procedure

To a solution of 9-pentyl-3-[3-(4-phenyl-1H-pyrazol-1-yl)propyl]-6,9-dihydro-5H-[1,2,4]triazolo[4,3-a]purin-5-one (234 mg, 0.543 mmol) in THF (45 ml) at room temperature was added N-bromosuccinimide (145 mg, 0.814 mmol). After stirring at 70° C. for 1 hour, the reaction mixture was concentrated and then purified by preparative LCMS to give the desired product (106 mg, 38%) as white solid. LCMS calculated for C23H26BrN8O (M+H): 509.1, 511.1; found: 509.0, 511.1.

Workup

concentrationthe reaction mixture was concentrated
custompurified by preparative LCMS

Sources & evidence

ORD record: ord-eb3b578650aa424188ad18c782068849
Source dataset: uspto-grants-2009_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07511050B2

Reaction notes

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