Method for working up benzimidazolone-containing reaction...

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

C - Chemistry, Metallurgy

07

D

C07D 235/26 (2006.01) B01D 19/04 (2006.01)

Patent

CA 2188218

The present invention relates to a process for working up reaction mixtures containing benzimidazolones of the formula (I) Image (I) prepared by reacting o-phenylenediamines and urea in a water-insoluble solvent, where in formula (I) R1, R2 and R3 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 ofwater and with stirring and filtering off the benzimidazolone from the aqueous suspension arising.

Affiliated with

Also associated with

Rating

Method for working up benzimidazolone-containing reaction... 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..., 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... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1520650