Process for the preparation of 2-pyridylsulfonylureas, and...

Details Process for the preparation of 2-pyridylsulfonylureas, and... Process for the preparation of 2-pyridylsulfonylureas, and...

C - Chemistry, Metallurgy

07

D

C07D 401/12 (2006.01) C07D 401/14 (2006.01) C07D 413/14 (2006.01) C07D 513/04 (2006.01) C07D 521/00 (2006.01)

Patent

CA 2065802

ABSTRACT OF THE DISCLOSURE: HOE 91/F 108 Process for the preparation of 2-pyridylsulfonylureas, and thiadiazolopyridines as intermediates in this process The process according to the invention for the prepara- tion of herbicidal pyridylsulfonylureas of the formula (I) Image (I) in which R1 to R5 and X are as defined in claim 1 com- prises the reaction of the zwitterion (II) with the amino heterocycle (III) Image Image (II) (III) The novel zwitterionic 1,1,3-trioxo-1,2,4-thiadiazolo- [4,5-a]pyridines can be obtained according to the invention by the reaction of phosgene with compounds IV, or the reaction of phosgene with compounds V (IV) Image Image (V) in the presence of an alkyl isocyanate.

Affiliated with

Also associated with

Rating

Process for the preparation of 2-pyridylsulfonylureas, and... 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 2-pyridylsulfonylureas, and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of 2-pyridylsulfonylureas, and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-2074365