N-bromobutanimide → 4-(7-(Bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-bromo-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)cyclohexanone

HRID 334361Notes

Reaction equation

HRID 334361 reaction equation
[CH3:1][Si:2]([CH3:45])([CH3:44])[CH2:3][CH2:4][O:5][CH2:6][N:7]([CH2:36][O:37][CH2:38][CH2:39][Si:40]([CH3:43])([CH3:42])[CH3:41])[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][C:32](=[O:35])[CH2:31][CH2:30]2)[CH:9]=1.C1C(=O)N([Br:53])C(=O)C1>CC#N.C(Cl)Cl>[CH3:1][Si:2]([CH3:45])([CH3:44])[CH2:3][CH2:4][O:5][CH2:6][N:7]([CH2:36][O:37][CH2:38][CH2:39][Si:40]([CH3:43])([CH3:42])[CH3:41])[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][C:32](=[O:35])[CH2:31][CH2:30]2)[C:9]=1[Br:53]

Participants

4

Reactant 2

HCID 67184N-bromobutanimideHCID 665838044-(7-(Bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)cyclohexanone

Product 1

HCID 866866634-(7-(Bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-bromo-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)cyclohexanoneYield 86.9%

Reagents, catalysts & solvents 1

HCID 21877088Acetonitrile methylene chlorideSolvent

Procedure

To a solution of 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)cyclohexanone (128 mg, 0.199 mmol) in CH3CN/DCM (3/1 mL) was added NBS (42.5 mg, 0.239 mmol) and stirred at rt for 30 min. TLC showed complete conversion. All the volatiles were removed under reduced pressure and the residue was purified by a SiO2 column (0-15% EtOAc/Hexanes, Rf=0.6 in 20% EtOAc) to afford 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-bromo-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)cyclohexanone as a pale yellow oil (125 mg).

Workup

  1. customAll the volatiles were removed under reduced pressure
  2. customthe residue was purified by a SiO2 column (0-15% EtOAc/Hexanes, Rf=0.6 in 20% EtOAc)

Sources & evidence

ORD record
ord-8761742ec5ff43d9bd56ed2b7b05c486
Source dataset
uspto-grants-2014_11
Patent number
US08883801B2

Reaction notes

Loading…