Process for production of 2,6-dimethyl-1-naphthaldehyde

Details Process for production of 2,6-dimethyl-1-naphthaldehyde Process for production of 2,6-dimethyl-1-naphthaldehyde

2011-03-08

2011-03-08

Witherspoon, Sikarl A (Department: 1621)

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

Organic compounds

Oxygen containing

Reexamination Certificate

active

07902405

ABSTRACT:
2,6-Dimethyl-1-naphthaldehyde having a ratio of the amount of 3,7-dimethyl-1-naphthaldehyde to the total amount of 2,6-dimethyl-1-naphthaldehyde and 3,7-dimethyl-1-naphthaldehyde of 30 mol % or less is particularly useful as optical functional materials, etc. The present invention provides a process for producing such 2,6-dimethyl-1-naphthaldehyde in an industrially advantageous manner. Specifically, in the process for producing 2,6-dimethyl-1-naphthaldehyde through formylation of 2,6-dimethylnaphthalene with carbon monoxide, formylation is performed in the presence of hydrogen fluoride in an amount of 5 to 100 times by mole and boron trifluoride in an amount of 0.5 to 3.5 times by mole, with respect to 2,6-dimethylnaphthalene, and at a reaction temperature of 35 to 70° C.

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