| 摘要 |
1. Chloroformates containing a vinyl structure, characterized in that they are represented by the formula : see diagramm : EP0283333,P13,F2 in which : - R1 and R2 , which may be identical or different, each represent a chlorine atom, a bromine atom or a saturated, linear or branched alkyl radical containing 1 to 4 carbon atoms, the said radicals R1 and R2 being able to form, together and with the carbon to which they are bonded, an aliphatic ring containing 4 to 8 carbon atoms, - R3 represents : - hydrogen when at least one of the radicals R1 or R2 represents an alkyl radical, - a saturated, linear or branched alkyl radical containing 1 to 4 carbon atoms, the said radical R3 being able to form, with the said radical R2 and the carbons to which they are bonded, a hydrocarbon ring containing 5 to 8 carbon atoms, optionally substituted by oxygen atoms forming the ketone function with the carbons of the ring, - an aryl radical, optionally substituted by alkyl groups and containing in total up to 8 carbon atoms, - the cyano radical -C=N, - or a phosphonate radical of general formula see diagramm : EP0283333,P13,F3 in which R4 and R5 , which may be identical or different, each represent a saturated, linear or branched alkyl radical containing 1 to 4 carbon atoms.
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