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Boron tribromide → (S)-2-(1-((6-Amino-5-(3,4-difluoro-5-hydroxyphenyl)pyrimidin-4-yl)amino)ethyl)-5-methyl-3-phenylpyrrolo[2,1-f][1,2,4]triazin-4(3H)-one

HRID 1052670
Notes
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Reaction equation

HRID 1052670 reaction equation
[NH2:1][C:2]1[N:7]=[CH:6][N:5]=[C:4]([NH:8][C@H:9]([C:11]2[N:16]([C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=3)[C:15](=[O:23])[C:14]3=[C:24]([CH3:27])[CH:25]=[CH:26][N:13]3[N:12]=2)[CH3:10])[C:3]=1[C:28]1[CH:33]=[C:32]([O:34]C)[C:31]([F:36])=[C:30]([F:37])[CH:29]=1.B(Br)(Br)Br>ClCCl.C(OCC)(=O)C>[NH2:1][C:2]1[N:7]=[CH:6][N:5]=[C:4]([NH:8][C@H:9]([C:11]2[N:16]([C:17]3[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=3)[C:15](=[O:23])[C:14]3=[C:24]([CH3:27])[CH:25]=[CH:26][N:13]3[N:12]=2)[CH3:10])[C:3]=1[C:28]1[CH:33]=[C:32]([OH:34])[C:31]([F:36])=[C:30]([F:37])[CH:29]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 2

HCID 25134Boron tribromideHCID 118433822(S)-2-(1-((6-Amino-5-(3,4-difluoro-5-methoxyphenyl)pyrimidin-4-yl)amino)ethyl)-5-methyl-3-phenylpyrrolo[2,1-f][1,2,4]triazin-4(3H)-one

Product 1

HCID 73774795(S)-2-(1-((6-Amino-5-(3,4-difluoro-5-hydroxyphenyl)pyrimidin-4-yl)amino)ethyl)-5-methyl-3-phenylpyrrolo[2,1-f][1,2,4]triazin-4(3H)-oneYield 44%

Reagents, catalysts & solvents 2

HCID 6344
Dichloromethane
Solvent
HCID 8857Ethyl AcetateSolvent

Procedure

(S)-2-(1-((6-Amino-5-(3,4-difluoro-5-methoxyphenyl)pyrimidin-4-yl)amino)ethyl)-5-methyl-3-phenylpyrrolo[2,1-f][1,2,4]triazin-4(3H)-one (87 mg, 0.17 mmol) was dissolved in 3 mL dichloromethane. A solution of boron tribromide (1M, 520 μl, 0.52 mmol) was added dropwise and the reaction was stirred at room temperature overnight. Further tribromide (1M in dichloromethane, 260 μl, 0.26 mmol) was added dropwise and stirred for 2 h more. The mixture was diluted with ethyl acetate and washed with a solution of 4% sodium bicarbonate, water, brine and dried over sodium sulphate, filtered and evaporated under reduced pressure. The residue was purified by reverse phase using SP1® Purification System to give 25 mg (44% yield) of the title compound as a solid. Purity 99%.

Workup

  1. stirringstirred for 2 h more
  2. washwashed with a solution of 4% sodium bicarbonate, water, brine
  3. dry with materialdried over sodium sulphate
  4. filtrationfiltered
  5. customevaporated under reduced pressure
  6. customThe residue was purified by reverse phase
  7. custom® Purification System

Sources & evidence

ORD record
ord-fff7f02ca3ca4306bd8a34751b568386
Source dataset
uspto-grants-2016_07
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09388189B2

Reaction notes

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