Process for preparing ring-halogenated vinyl aromatic monomers

Details Process for preparing ring-halogenated vinyl aromatic monomers Process for preparing ring-halogenated vinyl aromatic monomers

1984-10-01

1986-12-30

Trousof, Natalie

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

Organic compounds

Halogen containing

570193, C07C 1734

Patent

active

046330267

ABSTRACT:
A process for preparing ring-halogenated vinyl aromatic monomers comprising reacting ring-halogenated (alpha- or beta-bromoethyl)benzenes or ring-halogenated (alpha- or beta-bromoethyl)toluenes with a strong aqueous alkali base in the presence of a poly(ethylene glycol) catalyst and an amine selected from the group consisting of the structure: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 are independently selected from the group consisting of hydrogen and C.sub.1 to C.sub.10 alkyl groups. The organic phase is separated, washed and neutralized and the ring-halogenated vinyl aromatic monomer is recovered.

REFERENCES:
patent: 4292453 (1981-09-01), Daren et al.
patent: 4338474 (1982-07-01), Jackisch
patent: 4343956 (1982-08-01), Jackisch
patent: 4376221 (1983-03-01), Jackisch
Stott et al., Modified Crown Ether Catalysts. 3. Structural Parameters Affecting Phase Transfer Catalysis by Crown Ethers and a Comparison of the Effectiveness of Crown Ethers to That of Other Phase Transfer Catalysts, J. Am. Chem. Soc., vol. 102, No. 14, 1980, pp. 4810-4815.
Poly(ethylene glycols) are Extraordinary Catalysts in Liquid-Liquid Two Phase Dehydrohalogenation by Kimura et al.

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