Process for production of polyalkyl-substituted aromatic...

Details Process for production of polyalkyl-substituted aromatic... Process for production of polyalkyl-substituted aromatic...

2005-04-19

2005-04-19

Richter, Johann (Department: 1621)

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

Organic compounds

Oxygen containing

C568S437000

Reexamination Certificate

active

06881866

ABSTRACT:
In the process of the present invention, a polyalkyl-substituted aromatic aldehyde is produced by the formylation of a corresponding polyalkyl-substituted aromatic compound with carbon monoxide in the presence of hydrogen fluoride/boron trifluoride catalyst. By limiting the amount of hydrogen fluoride to a specific range, the formylation rapidly proceeds under mild conditions without causing the precipitation of solid matters even when the starting polyalkyl-substituted aromatic compound has alkyl groups on both the carbon atoms adjacent to the site to be formylated.

REFERENCES:
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patent: 3948998 (1976-04-01), Fujiyama et al.
patent: 4460794 (1984-07-01), Fujiyama et al.
patent: 0 083 224 (1983-07-01), None
patent: 1 422 308 (1976-01-01), None
European Search Report mailed Oct. 2, 2003, for EP 03 01 4141.

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