Diisopropylethylamine → 2-bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (1-oxazol-2-yl-ethyl)-amide

HRID 245920Notes

Reaction equation

HRID 245920 reaction equation
[Br:1][C:2]1[N:3]=[C:4]2[C:10]([C:11]([OH:13])=O)=[CH:9][N:8]([CH2:14][O:15][CH2:16][CH2:17][Si:18]([CH3:21])([CH3:20])[CH3:19])[C:5]2=[N:6][CH:7]=1.Cl.Cl.[O:24]1[CH:28]=[CH:27][N:26]=[C:25]1[CH:29]([NH2:31])[CH3:30].C(N(CC)C(C)C)(C)C.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>CN(C=O)C>[O:24]1[CH:28]=[CH:27][N:26]=[C:25]1[CH:29]([NH:31][C:11]([C:10]1[C:4]2[C:5](=[N:6][CH:7]=[C:2]([Br:1])[N:3]=2)[N:8]([CH2:14][O:15][CH2:16][CH2:17][Si:18]([CH3:21])([CH3:20])[CH3:19])[CH:9]=1)=[O:13])[CH3:30]

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 584385252-bromo-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acidHCID 866779151-Oxazol-2-yl-ethylamine dihydrochloride

Product 1

HCID 866779212-bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (1-oxazol-2-yl-ethyl)-amideYield 71%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A round-bottomed flask was charged with 2-bromo-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (300 mg, 0.81 mmol) and 1-oxazol-2-yl-ethylamine dihydrochloride (244 mg, 1.0 mmol). DMF (4 ml) was added followed by N,N-diisopropylethylamine (0.9 ml, 5.15 mmol) and HATU (337 mg, 0.89 mmol). The reaction mixture was stirred at room temperature overnight then quenched with water and diluted with petroleum ether. The resulting suspension was filtered. The filter cake was washed with water and petroleum ether then dried under high vacuum to afford 268 mg (71%) of 2-bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid (1-oxazol-2-yl-ethyl)-amide as an off-white powder.

Workup

  1. customthen quenched with water
  2. additiondiluted with petroleum ether
  3. filtrationThe resulting suspension was filtered
  4. washThe filter cake was washed with water and petroleum ether
  5. customthen dried under high vacuum

Sources & evidence

ORD record
ord-d3bb689221e04cebbfe89b7c9db0f201
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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