N-bromobutanimide → 2-methoxyethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-bromo-3-(1-phenyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidin-5-yl)-1-(2-methoxyethoxy)cyclohexanecarboxylate

HRID 2368998Notes

Reaction equation

HRID 2368998 reaction equation
[CH3:1][Si:2]([CH3:55])([CH3:54])[CH2:3][CH2:4][O:5][CH2:6][N:7]([CH2:46][O:47][CH2:48][CH2:49][Si:50]([CH3:53])([CH3:52])[CH3:51])[C:8]1[N:13]2[N:14]=[CH:15][C:16]([C:17]3[CH:18]=[N:19][N:20]([C:22]4[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=4)[CH:21]=3)=[C:12]2[N:11]=[C:10]([CH:28]2[CH2:33][CH2:32][C:31]([O:41][CH2:42][CH2:43][O:44][CH3:45])([C:34]([O:36][CH2:37][CH2:38][O:39][CH3:40])=[O:35])[CH2:30][CH2:29]2)[CH:9]=1.C1C(=O)N([Br:63])C(=O)C1>CC#N>[CH3:55][Si:2]([CH3:1])([CH3:54])[CH2:3][CH2:4][O:5][CH2:6][N:7]([CH2:46][O:47][CH2:48][CH2:49][Si:50]([CH3:53])([CH3:52])[CH3:51])[C:8]1[N:13]2[N:14]=[CH:15][C:16]([C:17]3[CH:18]=[N:19][N:20]([C:22]4[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=4)[CH:21]=3)=[C:12]2[N:11]=[C:10]([CH:28]2[CH2:33][CH2:32][C:31]([O:41][CH2:42][CH2:43][O:44][CH3:45])([C:34]([O:36][CH2:37][CH2:38][O:39][CH3:40])=[O:35])[CH2:30][CH2:29]2)[C:9]=1[Br:63]

Participants

4

Reactant 2

HCID 67184N-bromobutanimideHCID 665837282-methoxyethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-(1-phenyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidin-5-yl)-1-(2-methoxyethoxy)cyclohexanecarboxylate

Product 1

HCID 866867372-methoxyethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-bromo-3-(1-phenyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidin-5-yl)-1-(2-methoxyethoxy)cyclohexanecarboxylateYield 99.7%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a solution of 2-methoxyethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-(1-phenyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidin-5-yl)-1-(2-methoxyethoxy)cyclohexanecarboxylate (2.28 g, 2.87 mmol) in CH3CN (50 mL) was added NBS (511 mg, 2.87 mmol) and stirred at room temperature for 30 min. Both TLC and LCMS showed complete conversion. All the volatiles were removed under reduced pressure and the residue was purified by a SiO2 column (0-30%, EtOAc/Hexanes, Rf=0.65 in 50% EtOAc) to afford 2-methoxyethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-bromo-3-(1-phenyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidin-5-yl)-1-(2-methoxyethoxy)cyclohexanecarboxylate as a yellow oil (2.50 g, 99%).

Workup

  1. customAll the volatiles were removed under reduced pressure
  2. customthe residue was purified by a SiO2 column (0-30%, EtOAc/Hexanes, Rf=0.65 in 50% EtOAc)

Sources & evidence

ORD record
ord-c021be9a41fd4f5bab0d995160a5492a
Source dataset
uspto-grants-2014_04
Patent number
US08703784B2

Reaction notes

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