Process for the production of unsubstituted or polysubstituted o

Details Process for the production of unsubstituted or polysubstituted o Process for the production of unsubstituted or polysubstituted o

1978-12-21

1980-06-03

Helfin, Bernard

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

Organic compounds

Oxygen containing

260465R, 260465H, 562459, 568424, 568436, C07C 4500

Patent

active

042061520

ABSTRACT:
The present invention provides a process for the production of unsubstituted or substituted o-phthalaldehydes by hydrolysis of .alpha.,.alpha., .alpha.',.alpha.'-tetrahalogeno-o-xylenes with a carboxylate in an aqueous medium in the presence of a phase transfer catalyst and an organic base.

REFERENCES:
patent: 4079075 (1978-03-01), Lee et al.
patent: 4125561 (1978-11-01), Redecker et al.

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