Method for working up benzimidazolone-containing reaction mixtur

Details Method for working up benzimidazolone-containing reaction mixtur Method for working up benzimidazolone-containing reaction mixtur

1996-10-18

2000-09-26

Stockton, Laura L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23526

Patent

active

061244708

ABSTRACT:
The present invention relates to a process for working up reaction mixtures containing benzimidazolones of the formula (I) ##STR1## prepared by reacting o-phenylenediamines and urea in a water-insoluble solvent, where in formula (I) R.sup.1, R.sup.2 and R.sup.3 are identical or different and independently of one another are a hydrogen atom, an alkyl, alkoxy or alkylsulfonyl group having in each case 1 to 6 carbon atoms, chlorine, bromine, a substituted or unsubstituted phenyl group, a carboxylic acid, methylcarbonyl, phenylcarbonyl, methoxycarbonyl, carbamoyl, methylcarbamoyl or phenylcarbamoyl group, a hydroxyl group, cyano group or nitro group, by adding a wetting agent and a defoamer to the reaction mixture, distilling off the solvent azeotropically with the addition of water and with stirring and filtering off the benzimidazolone from the aqueous suspension arising.

REFERENCES:
patent: 4138568 (1979-02-01), Hari et al.

Affiliated with

Also associated with

Rating

Method for working up benzimidazolone-containing reaction mixtur does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for working up benzimidazolone-containing reaction mixtur, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for working up benzimidazolone-containing reaction mixtur will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2101363