Benzyl chloroformate → HCID 20378272, compound

HRID 2051951Notes

Reaction equation

HRID 2051951 reaction equation
[C:1]1([C:7]2[N:8]=[C:9]([S:18][C:19]([F:24])([F:23])[CH:20]([F:22])[F:21])[NH:10][C:11]=2[C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.CC(C)([O-])C.[K+].Cl[C:32]([O:34][CH2:35][C:36]1[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=1)=[O:33]>C(COC)OC>[CH2:35]([O:34][C:32]([N:10]1[C:11]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[C:7]([C:1]2[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=2)[N:8]=[C:9]1[S:18][C:19]([F:23])([F:24])[CH:20]([F:22])[F:21])=[O:33])[C:36]1[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=1

Participants

5

Reactant 3

HCID 10387Benzyl chloroformateHCID 135080754,5-Diphenyl-2-(1,1,2,2-tetrafluoroethylthio)imidazoleHCID 23665647Potassium tert-butoxide

Product 1

HCID 20378272HCID 20378272, compoundYield 177.7%

Reagents, catalysts & solvents 1

HCID 80711,2-DimethoxyethaneSolvent2×

Procedure

To a solution of 5.0 g (0.014 mole) of 4,5-diphenyl-2-(1,1,2,2-tetrafluoroethylthio)imidazole in 50 ml glyme was added 1.7 g (0.015 mole) of potassium t-butoxide. The mixture was cooled and a solution of 5.0 g (0.029 mole) of benzyl chloroformate in 25 ml glyme was added dropwise. The reaction mixture was stirred at room temperature overnight, then poured onto water. The mixture was extracted with ether and the combined ether extracts were washed, then dried and concentrated to give 12.1 g of crystals. The product was purified by chromatography on silica gel, eluting with toluene, to give 2.1 g of colorless crystals (from hexane), mp 110°-111°.

Workup

  1. temperatureThe mixture was cooled
  2. additionpoured onto water
  3. extractionThe mixture was extracted with ether
  4. washthe combined ether extracts were washed
  5. customdried
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-2224d295f8ec4ea4a05becdc7aa80e87
Source dataset
uspto-grants-1980_01
Patent number
US04182769

Reaction notes

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