Dimethyl Sulfoxide → Cyclopropanecarboxylic acid, 3-(2,2-dichloroethenyl)-2,2-dimethyl-, ethyl ester

HRID 127855

Reaction equation

HRID 127855 reaction equation
[Cl:1][C:2]([Cl:19])=[CH:3][CH:4]1[C:6]([CH3:8])([CH3:7])[C:5]1(C(OCC)=O)[C:9]([O:11][CH2:12][CH3:13])=[O:10].[Cl-].[Na+].CS(C)=O>O>[Cl:1][C:2]([Cl:19])=[CH:3][CH:4]1[C:6]([CH3:8])([CH3:7])[CH:5]1[C:9]([O:11][CH2:12][CH3:13])=[O:10]

Participants

5

Reactant 3

HCID 679Dimethyl SulfoxideHCID 5234Sodium ChlorideHCID 14914133Ethyl 2-(2,2-dichlorovinyl)-3,3-dimethyl-1-ethoxycarbonylcyclopropanecarboxylate

Product 1

HCID 101094Cyclopropanecarboxylic acid, 3-(2,2-dichloroethenyl)-2,2-dimethyl-, ethyl esterYield 80%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A mixture of ethyl 2-(2,2-dichlorovinyl)-3,3-dimethyl-1-ethoxycarbonylcyclopropane carboxylate (5.0 g.), sodium chloride (0.95 g.), and `wet` dimethylsulphoxide (6.0 ml.) was heated at a temperature of 175° to 180° C. under a nitrogen atmosphere for a period of 6 hours, after which it was cooled to the ambient temperature poured into water and extracted with petroleum ether (boiling range 60° to 80° C.). The extracts were dried over anhydrous magnesium sulphate and concentrated by evaporation of the solvent to yield a residue comprising about 60% of the cis-isomer and 40% of the trans-isomer of ethyl 2-(2,2-dichlorovinyl)-3,3-dimethylcyclopropane carboxylate in about 80% yield, identification of which was confirmed by comparison with authentic samples using infra-red spectroscopy and gas-liquid chromatography.

Workup

  1. extractionextracted with petroleum ether (boiling range 60° to 80° C.)
  2. dry with materialThe extracts were dried over anhydrous magnesium sulphate
  3. concentrationconcentrated by evaporation of the solvent

Sources & evidence

ORD record
ord-a1277ad513494b1ca85bcb36df13e863
Source dataset
uspto-grants-1981_03
Patent number
US04257975

Linked notes

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