Abstract A simple synthesis involving fusion of catechol and derivatives with 3, 4, 5- trichloropyridazine has furnished 4-chloro [1, 4] benzodioxino [2, 3-c] pyridazines 5 for the first time. This new method complements the previously reported base promoted procedure for preparing 4-chloro [1, 4] benzodioxino-[2, 3-d] pyridazines 3. Employing both methods, 4- (trifluoromethyl) catechol was converted to the four regio isomers 3b, c and 5c, d. Structure ...
![[1,4]benzodioxino[2,3-d]pyridazine Structure](https://image.chemsrc.com/caspic/022/55826-70-5.png)