Process for the isomerization of halogenated thiophenes

Details Process for the isomerization of halogenated thiophenes Process for the isomerization of halogenated thiophenes

1985-05-23

1986-08-05

Siegel, Alan

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549 82, C07D33328

Patent

active

046044701

ABSTRACT:
The invention relates to a process for the isomerization of halogenated thiophenes on zeolite catalysts. In this manner, in particular, 2-chlorothiophene is isomerized to 3-chlorothiophene and 2-bromothiophene is isomerized to 3-bromothiophene. Particularly suitable zeolites are synthetic zeolites of the pentasil, mordenite or faujasite type in their acid form.

REFERENCES:
patent: 2492622 (1949-12-01), Coonradt
Chemical Abstracts, vol. 95(23), p. 574, No. 202731m, (Dec. 7, 1981).
Chemical Abstracts, vol. 69(11), p. 4092, No. 43711z, (Sep. 9, 1968).
Ullmann's Encyclopedia of Industrial Chemistry, 4th edition, vol. 23, p. 219.
S. Conde, Synthesis 1976, 6, p. 412.
Pentasil Family of High Silica Crystalline Materials-In Special Publication No. 33 of the Chemical Society, London, 1979.

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