Preparation of dihalovinyl compounds

Details Preparation of dihalovinyl compounds Preparation of dihalovinyl compounds

1981-05-22

1982-06-15

Shippen, Michael

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

568346, 568591, 568347, 570217, C07C 67317, C07C 4565, C07C 4148

Patent

active

043352537

ABSTRACT:
A process for the preparation of dihalovinyl compounds of the formula ##STR1## wherein each Hal is fluorine, chlorine or bromine, R.sup.1 is an optionally substituted hydrocarbyl group, R.sup.2 is a methyl group or a hydrogen atom, or R.sup.1 and R.sup.2 together with the carbon atom to which they are attached form cycloalkylidene group, which process comprises treating a trihalo compound of the formula ##STR2## wherein Hal, R.sup.1 and R.sup.2 have the above meanings and R.sup.3 is a hydrogen atom or ##STR3## in which M is an alkali atom, with PHal.sub.3.

REFERENCES:
patent: 4018838 (1977-04-01), Cleare
patent: 4166063 (1979-08-01), Martel et al.

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