Process for preparing 4-amino-pyridazines
AssigneeBASF SE
InventorsEric George Klauber, Michael Rack, Roland Goetz, Sebastian Soergel
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Abstract
Provided herein is a process for preparing a pyridazine amine compound of formula V, and a process for preparing dichloropyridazine amine compounds of formula IVa, IVb, and mixtures thereof. Further, provided herein are dichloropyridazine amine compounds of formula IVa, IVb, and mixtures thereof, wherein the amino group is an ethylamino group.
Claims3
A process for preparing (a) a dichloropyridazine amine compound of formula IVa or a salt, tautomer, or N-oxide thereof, or (b) a dichloropyridazine amine compound of formula IVb or a salt, tautomer, or N-oxide thereof, or (c) a mixture of (a) and (b)
- in a one-pot reaction comprising steps of
- reacting a compound of formula II
- with POCl3, and
- reacting the resulting crude reaction product with an amine compound R1—NH2 or a salt thereof, wherein R1 is CH2CH3.
Dependencies are inferred from the claim text.