Novel trifluoromethyl benzal chlorides and process for the prepa

Details Novel trifluoromethyl benzal chlorides and process for the prepa Novel trifluoromethyl benzal chlorides and process for the prepa

1980-10-10

1983-01-04

Demers, Arthur P.

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

Organic compounds

Halogen containing

568437, C07B 900, C07C 1714, C07C 4500

Patent

active

043673481

ABSTRACT:
Novel meta- and para-trifluoromethyl benzal chlorides and ring-halogenated derivatives are useful chemical intermediates for the preparation of meta- and para-trifluoromethyl benzaldehydes and various other useful end products. The novel compounds can be prepared from readily-available xylene starting materials in a process comprising (a) chlorinating meta- or para-xylene, or a ring -halogenated meta- or para-xylene, to form a trichloromethyl benzal chloride product and (B) reacting the trichloromethyl benzal chloride product with about 3 moles or less of anhydrous hydrogen fluoride in the presence of a halogen exchange catalyst.

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