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 334358Notes

Reaction equation

HRID 334358 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 rt 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). HPLC-MS TR=1.99 min (UV 254 nm, 3 min method); mass calculated for formula C40H61BrN6O7Si2 872.3, observed LCMS m/z 873.3 (M+H).

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-d8539f0a5ad842b89bee34071706c589
Source dataset
uspto-grants-2014_11
Patent number
US08883801B2

Reaction notes

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