Process for preparing 1,6-dibromo-2-naphthylene compounds

Details Process for preparing 1,6-dibromo-2-naphthylene compounds Process for preparing 1,6-dibromo-2-naphthylene compounds

1994-08-17

1995-06-20

Lone, Werren B.

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

Organic compounds

Oxygen containing

568735, 568779, C07C 3938, C07C 3924

Patent

active

054262437

ABSTRACT:
An improved process for the preparation of 1,6-dibromo-2 -naphthol is disclosed. The improvement is accomplished by carrying out the reaction in an organic solvent at a temperature of from about 40.degree. to about 60.degree. C. in the presence of a catalytically-effective amount of a compound of the formula: ##STR1## where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and are alkyl, cycloalkyl, phenyl, substituted phenyl, naphthyl, substituted naphthyl heteroaryl, substituted heteroaryl or R.sub.1 taken together with R.sub.2 and the nitrogen atom form a heteroaryl or substituted heteroaryl group in which the heteroatom is nitrogen and X is an inorganic anion.

REFERENCES:
patent: 4628123 (1986-12-01), Borsotti
patent: 4855514 (1989-08-01), Rule et al.
patent: 4876396 (1989-10-01), LeBlance et al.
patent: 4885408 (1989-12-01), Ratton et al.
patent: 5243088 (1993-09-01), Jacquot
patent: 5256829 (1993-10-01), Jacquot

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