N-bromobutanimide → Tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-bromo-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)piperidine-1-carboxylate

HRID 1913251Notes

Reaction equation

HRID 1913251 reaction equation
[CH3:1][Si:2]([CH3:51])([CH3:50])[CH2:3][CH2:4][O:5][CH2:6][N:7]([CH2:42][O:43][CH2:44][CH2:45][Si:46]([CH3:49])([CH3:48])[CH3:47])[C:8]1[N:13]2[N:14]=[CH:15][C:16]([C:17]3[CH:18]=[N:19][C:20]([C:23]4[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=4)=[CH:21][CH:22]=3)=[C:12]2[N:11]=[C:10]([CH:29]2[CH2:34][CH2:33][N:32]([C:35]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])=[O:36])[CH2:31][CH2:30]2)[CH:9]=1.[Br:52]N1C(=O)CCC1=O>CN(C=O)C.CCOC(C)=O>[CH3:49][Si:46]([CH3:48])([CH3:47])[CH2:45][CH2:44][O:43][CH2:42][N:7]([CH2:6][O:5][CH2:4][CH2:3][Si:2]([CH3:1])([CH3:50])[CH3:51])[C:8]1[N:13]2[N:14]=[CH:15][C:16]([C:17]3[CH:18]=[N:19][C:20]([C:23]4[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=4)=[CH:21][CH:22]=3)=[C:12]2[N:11]=[C:10]([CH:29]2[CH2:34][CH2:33][N:32]([C:35]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])=[O:36])[CH2:31][CH2:30]2)[C:9]=1[Br:52]

Participants

5

Reactant 2

HCID 67184N-bromobutanimide2×HCID 66584899Tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)piperidine-1-carboxylate

Product 1

HCID 66584941Tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-bromo-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)piperidine-1-carboxylateYield 88%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)piperidine-1-carboxy late (Int-9h, 3.24 g, 4.44 mmol) in DMF (20 mL) was added N-bromosuccinimide (750 mg, 4.21 mmol). The mixture was allowed to stir at room temperature for one hour. More N-bromosuccinimide (75 mg) was added and the mixture was stirred for another half hour before being diluted with EtOAc (200 mL). The mixture was washed with water three times, brine and dried (MgSO4). After solvent was removed under reduced pressure, and the residue was purified on silica. Elution with EtOAc in hexanes (0-50%) gave the title compound (3 g, 83%). LC/MS: m/z=809 (M+H+).

Workup

  1. stirringthe mixture was stirred for another half hour
  2. washThe mixture was washed with water three times, brine
  3. dry with materialdried (MgSO4)
  4. customAfter solvent was removed under reduced pressure
  5. customthe residue was purified on silica
  6. washElution with EtOAc in hexanes (0-50%)

Sources & evidence

ORD record
ord-12f05582d8874ba0b8c61da84dc82769
Source dataset
uspto-grants-2013_12
Patent number
US08609675B2

Reaction notes

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