Triethylamine → 5-[2-(Phthalimido)ethylthio]imidazo[1,2-a]pyridine

HRID 1081721Notes

Reaction equation

HRID 1081721 reaction equation
[SH:1][C:2]1[N:7]2[CH:8]=[CH:9][N:10]=[C:6]2[CH:5]=[CH:4][CH:3]=1.Br[CH2:12][CH2:13][N:14]1[C:18](=[O:19])[C:17]2=[CH:20][CH:21]=[CH:22][CH:23]=[C:16]2[C:15]1=[O:24].C(N(CC)CC)C>C(O)C>[C:15]1(=[O:24])[N:14]([CH2:13][CH2:12][S:1][C:2]2[N:7]3[CH:8]=[CH:9][N:10]=[C:6]3[CH:5]=[CH:4][CH:3]=2)[C:18](=[O:19])[C:17]2=[CH:20][CH:21]=[CH:22][CH:23]=[C:16]12

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 113251H-Isoindole-1,3(2H)-dione, 2-(2-bromoethyl)-HCID 178418687HCID 178418687, compound

Product 1

HCID 233629915-[2-(Phthalimido)ethylthio]imidazo[1,2-a]pyridineYield 61.1%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

To a suspension of 5-mercaptoimidazo[1,2-a]pyridine (3.00 g, 20 mmoles) and N-[2-(bromo)ethyl]phthalimide (5.59 g, 22 mmoles) in ethanol (200 ml) was added triethylamine (4.2 ml, 30 mmoles) and the mixture was stirred at room temperature for 3 hours and heated at reflux for 4 hours. After the solvent was distilled off, chloroform was added to the residue, which was washed with water, dried over anhydrous magnesium sulfate and the solvent was distilled off. Then, the residue was purified by column chromatography (eluent:ethyl acetate) to obtain 3.95 g of the desired product (61.1%, yellow crystals).

Workup

  1. temperatureheated
  2. temperatureat reflux for 4 hours
  3. distillationAfter the solvent was distilled off
  4. additionchloroform was added to the residue, which
  5. washwas washed with water
  6. dry with materialdried over anhydrous magnesium sulfate
  7. distillationthe solvent was distilled off
  8. customThen, the residue was purified by column chromatography (eluent:ethyl acetate)

Sources & evidence

ORD record
ord-a0d2517e78ec421396f03323d6b34d36
Source dataset
uspto-grants-1996_12
Patent number
US05587383

Reaction notes

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