Process for preparing monobrominated cyclobutarenes

Details Process for preparing monobrominated cyclobutarenes Process for preparing monobrominated cyclobutarenes

1987-06-22

1989-04-18

Lone, Werren B.

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

Organic compounds

Halogen containing

570207, 570208, 570209, 570211, C07C 2124, C07C 1700

Patent

active

048229300

ABSTRACT:
Monobrominated cyclobutarenes are prepared by brominating a cyclobutarene in the presence of an organic complexing agent, an acid scavenger, or water. Faster reaction rates highly selective to monobrominated cyclobutarenes are obtained without conventional heavy metal or halogen catalysts.

REFERENCES:
patent: 3420035 (1969-02-01), Bremmer
patent: 3607883 (1971-09-01), Schneider
patent: 3755444 (1973-08-01), Schneider et al.
patent: 3763248 (1973-10-01), Mitchell
patent: 3890326 (1975-06-01), Tobin
patent: 4540763 (1985-09-01), Kirchhoff
Lloyd et al., "The Electrophilic Substitution of Benzocyclobutene-II", Tetrahedron, 1965, vol. 21, pp. 245 to 254.
Lloyd et al., "Tetrahedron", vol. 20, pp. 2184-2194 (1964).

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