Preparation of 1-aryl-4,5-dihalo-pyridazone-6

Details Preparation of 1-aryl-4,5-dihalo-pyridazone-6 Preparation of 1-aryl-4,5-dihalo-pyridazone-6

1974-05-20

1976-01-27

Gallagher, Richard J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D23712

Patent

active

039352102

ABSTRACT:
Disclosed is single phase multi-stage process for preparation of 1-aryl-4,5-dihalo-pyridazones-6 involving the diazotization of an amino aryl compound, e.g. aniline, followed by reduction with sulfurous acid to obtain the corresponding aryl hydrazine which is then reacted at elevated temperatures with a mucohalic acid to obtain the 1-aryl-4,5-dihalo-pyridazone-6.

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