Process for halogenating cyclobutenoarenes

Details Process for halogenating cyclobutenoarenes Process for halogenating cyclobutenoarenes

1988-06-03

1990-02-06

Lone, Warren B.

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

Organic compounds

Halogen containing

570206, C07C 1712, C07C 1704

Patent

active

048989991

ABSTRACT:
A process for the preparation of cyclobutenohaloarenes is described in which a cyclobutenoarene such as benzocyclobutene is reacted with a halogen in the organic phase of a two-phase organic/aqueous system to form a cyclobutenohaloarene and hydrogen halide, the latter which migrates into the aqueous phase. The process has the advantages of low acidity of the reaction phase, and the consequent reduced side halogenation product formation and necessity for the introduction of caustic in the recovery step, and relatively simple recovery of the cyclobutenohaloarene from the reaction mixture.

REFERENCES:
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patent: 4540763 (1985-09-01), Kirchhoff
patent: 4570011 (1986-02-01), So
patent: 4590304 (1986-05-01), Wallace et al.
patent: 4622375 (1986-11-01), Wong
patent: 4638078 (1987-01-01), Kirchhoff
patent: 4642329 (1987-02-01), Kirchhoff et al.
patent: 4667004 (1987-05-01), Wong
patent: 4667005 (1987-05-01), Wong
patent: 4822930 (1989-04-01), Liu
Lloyd & Ongley, Tetrahedron 21, 245-254 (1965).

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