Process for the preparation of 3,6-disubstituted 4-...

Details Process for the preparation of 3,6-disubstituted 4-... Process for the preparation of 3,6-disubstituted 4-...

C - Chemistry, Metallurgy

07

D

260/248.6

C07D 253/06 (2006.01) C07D 253/07 (2006.01) C07D 405/04 (2006.01) C07D 409/04 (2006.01)

Patent

CA 1180014

ABSTRACT Process for the preparation of 3,6-di- substituted 4-amino-1,2,4-triazin-5-ones The herbicidal 3,6-substituted 4-amino-1,2,4- triazin-5-one of the general formula Image (I) wherein R1 and R2 have the meaning given in the description, is obtained in good yields by a new two-stage cyclis- ation reaction if an .alpha.-ketocarboxylic acid amide of the general formula R1-CO-CO-NHR3 (II) is reacted with a hydrazidine of the general formula Image (III) if appropriate in the presence of a diluent at tempera- tures between 0 and 150°C, whereby in the first process stage a condensation reaction takes place to give con- densation products which still have open chains, and in the second process stage an elimination reaction with ring closure takes place to give the end product of formula (I).

394706

Affiliated with

Also associated with

Rating

Process for the preparation of 3,6-disubstituted 4-... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of 3,6-disubstituted 4-..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of 3,6-disubstituted 4-... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1191483