
TY  - JOUR
A1  - Paul, DB 
A1  - Rodda, HJ 
T1  - Pyridopyridazines. III. The synthesis and reactions of 5- and 8-Chloropyrido[2,3d]pyridazine
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1969
VL  - 22
IS  - 8
SP  - 1759
EP  - 1772
KW  - 
UR  - https://doi.org/10.1071/CH9691759 
N2  - Pyrido[2,3-d]pyridazin-5-one and -8-one have been synthesized by several methods and converted into 5- and 8-chloropyrido[2,3- d]pyridazine. These latter compounds were also prepared by dehydrazination of the requisite chlorohydrazino- pyrido[2,3-d]pyridazines. Some nucleophilic reactions of the chloropyrido[2,3-d]- pyridazines have been studied. Cyclization of 5- and 8-hydrazino- and 5,8-dihydrazino-pyrido[2,3-d]pyridazine with formic acid has led to the new heterocyclic compounds pyrido[2,3-d]- and pyrido[3,2-d]-s- triazolo[4,3-d]pyridazine. 
ER  -

