Azo coupling of 2-nitroanilines with 2,4,-disbustituted phenols

Details Azo coupling of 2-nitroanilines with 2,4,-disbustituted phenols Azo coupling of 2-nitroanilines with 2,4,-disbustituted phenols

1994-09-12

1995-07-25

Ramsuer, Robert W.

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

Organic compounds

Azo

534843, 548260, C09B 4100, C07D24920

Patent

active

054363225

ABSTRACT:
A process for the preparation of compounds of the formula I is described ##STR1## in which R.sup.1 and R.sup.2 independently of one another are C.sub.1 -C.sub.7 alkyl; and R.sup.3 is hydrogen or halogen, by reaction of a diazonium salt of a 2-nitroaniline in acid aqueous solution with a phenol dispersed in water.
The process comprises employing as the dispersant a C.sub.8 -C.sub.20 alkanesulfonic acid or a corresponding alkanesulfonate or a mixture of sulfonic acid and sulfonate together with a polyvinyl alcohol.
The resulting compounds of the formula I can advantageously be reacted further to give benzotriazoles of the formula V ##STR2## which are used as light stabilizers.

REFERENCES:
patent: 3998804 (1976-12-01), Rody et al.
patent: 4891424 (1990-01-01), Seltzer et al.
Derwent Abst. 35772 A/20 of JP 53-37628 Apr. 6, 1978.
Chem. Abst. 94: 30333 (1980).

Affiliated with

Also associated with

Rating

Azo coupling of 2-nitroanilines with 2,4,-disbustituted phenols does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Azo coupling of 2-nitroanilines with 2,4,-disbustituted phenols, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Azo coupling of 2-nitroanilines with 2,4,-disbustituted phenols will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-740349