Water → 3-(2,2-Dichloroethenyl)-2,2-dimethyloxirane

To 30.6 g (0.2 mole) of 1,1-dichloro-4-methyl-1,3-pentadiene in 400 ml methylene chloride were added 0.35 mole of technical perchloroacetic acid containing 1.0 g sodium acetate at a temperature of 10°-20° C. over a period of 20 minutes. After stirring for 15 hours, the reaction mixture was poured into 500 ml of water. The phases were separated and the aqueous phase extracted twice with 150 ml of methylene chloride. The organic phases were combined and washed with 10% aqueous sodium carbonate (2×100 ml) and saturated aqueous sodium chloride (1×100 ml), dried over Na2SO4 and the solvent evaporated. The product was distilled to give 34 g of 1,1-dichloro-3,4-epoxy-4-methyl-1-pentene (82% yield).

1. customThe phases were separated
2. extractionthe aqueous phase extracted twice with 150 ml of methylene chloride
3. washwashed with 10% aqueous sodium carbonate (2×100 ml) and saturated aqueous sodium chloride (1×100 ml)
4. dry with materialdried over Na2SO4
5. customthe solvent evaporated
6. distillationThe product was distilled

ORD record

ord-8d0f078c621d459ca2f9ab0a05a5a8e3

Source dataset

uspto-grants-1980_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04229353