Process for the preparation of 3,4-dihalo-1,2-epoxybutanes...

Details Process for the preparation of 3,4-dihalo-1,2-epoxybutanes... Process for the preparation of 3,4-dihalo-1,2-epoxybutanes...

C - Chemistry, Metallurgy

07

D

C07D 303/08 (2006.01) C07D 301/00 (2006.01)

Patent

CA 2159004

Disclosed is a process for the preparation of 3,4-dichloro- and 3,4-dibromo-1,2-epoxybutane by the reaction of 3,4-epoxy-1-butene with chlorine or bromine in the presence of a catalytic amount of a tertiary amine or a hydrohalide of a primary, secondary or tertiary amine. The reaction preferably is carried out by the addition of 3,4-epoxy-1-butene and chlorine or bromine to an organic, halogenation solvent containing chlorine or bromine and tertiary amine or amine hydrohalide catalyst.

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