Dichloroacetyl chloride → 1,1-Dichloro-4-ethoxy-3-buten-2-one

At about 0° C., dichloroacetyl chloride (95% pure, 16.5 g, 0.11 mol) and ethyl vinyl ether (99% pure, 48.7 g, 0.67 mol) were added and stirred for 5 h. The mixture was then stirred at 22° C. for about 11 h. Most of the excess ethyl vinyl ether was then removed by distillation under reduced pressure (40° C./300-400 mbar). The product was separated off from the residue (18.7 g) by flash distillation (oil bath 100° C./0.7 mbar; transition 72° C.). The distillate obtained was a product mixture (15.6 g). This consisted to 80% (GC area %) of the desired product. Furthermore, the product mixture consisted to about 5% (GC area %) of 1,1-dichloro-4,4-diethoxy-2-butanone. Including the corresponding diethyl acetal, the yield was about 68%.

1. stirringThe mixture was then stirred at 22° C. for about 11 h
2. customMost of the excess ethyl vinyl ether was then removed by distillation under reduced pressure (40° C./300-400 mbar)
3. customThe product was separated off from the residue (18.7 g) by flash distillation (oil bath 100° C./0.7 mbar; transition 72° C.)
4. customThe distillate obtained

ORD record

ord-5b8c527c573d41a4b7705e96c5dc5598

Source dataset

uspto-grants-2012_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08153820B2