Acetic Acid → 3-(4-Bromo-2-(2-methyl-2H-[1,2,4]triazol-3-yl)-thiazol-5-yl)-7-(1-ethyl-propyl)-2,5-dimethyl-pyrazolo[1,5-a]pyrimidine

HRID 1660745Notes

Reaction equation

HRID 1660745 reaction equation
C(O)(=O)C.[Br:5]N1C(=O)CCC1=O.[CH2:13]([CH:15]([C:18]1[N:23]2[N:24]=[C:25]([CH3:38])[C:26]([C:27]3[S:31][C:30]([C:32]4[N:33]([CH3:37])[N:34]=[CH:35][N:36]=4)=[N:29][CH:28]=3)=[C:22]2[N:21]=[C:20]([CH3:39])[CH:19]=1)[CH2:16][CH3:17])[CH3:14]>C(#N)C>[Br:5][C:28]1[N:29]=[C:30]([C:32]2[N:33]([CH3:37])[N:34]=[CH:35][N:36]=2)[S:31][C:27]=1[C:26]1[C:25]([CH3:38])=[N:24][N:23]2[C:18]([CH:15]([CH2:16][CH3:17])[CH2:13][CH3:14])=[CH:19][C:20]([CH3:39])=[N:21][C:22]=12

Participants

5

Reactant 3

HCID 176Acetic AcidHCID 67184N-bromobutanimideHCID 674282857-(1-ethyl-propyl)-2,5-dimethyl-3-[2-(2-methyl-2H-[1,2,4]triazol-3-yl)-thiazol-5-yl)-pyrazolo[1,5-a]pyrimidine

Product 1

HCID 248989763-(4-Bromo-2-(2-methyl-2H-[1,2,4]triazol-3-yl)-thiazol-5-yl)-7-(1-ethyl-propyl)-2,5-dimethyl-pyrazolo[1,5-a]pyrimidineYield 90%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Conditions

Temperature
22 °C

Procedure

Add acetic acid (1 mL) and N-bromosuccinimide (4.1 g, 22 mmol) to a solution of 7-(1-ethyl-propyl)-2,5-dimethyl-3-[2-(2-methyl-2H-[1,2,4]triazol-3-yl)-thiazol-5-yl]-pyrazolo[1,5-a]pyrimidine (8 g, 21 mmol) in acetonitrile (80 mL). Stir the mixture 2 h at 22° C. Then evaporate the solvent and add water (50 mL) and methyl-t-butyl ether (100 mL) to the resulting residue. Separate the organic portion, dry over sodium sulfate, filter, and evaporate the solvent. Recrystallize the resulting residue from isopropyl alcohol to afford the title compound (8.7 g, 90%). ES/MS (m/z): (79Br/81Br) 460/462 (M+1)+.

Workup

  1. customThen evaporate the solvent
  2. additionadd water (50 mL) and methyl-t-butyl ether (100 mL) to the resulting residue
  3. customSeparate the organic portion
  4. dry with materialdry over sodium sulfate
  5. filtrationfilter
  6. customevaporate the solvent
  7. customRecrystallize the resulting residue from isopropyl alcohol

Sources & evidence

ORD record
ord-be3f95debbfb4ed4adc04edddfd1230f
Source dataset
uspto-grants-2011_10
Patent number
US08030304B2

Reaction notes

Loading…