914081-04-2Relevant articles and documents
Synthesis of 4-trifluoromethylpyrimido[4,5-c]-pyridazine-5,7-dignes from uracils
Takahashi, Masahiko,Ogawa, Yoshinobu,Inoue, Kazuhiro
, p. 1875 - 1883 (2007/10/03)
The reaction of 6-hydrazinouracils (1) with 3-aryl-1,1,1-trifluoropropane-2,3-dione monohydrates (2) in refluxing ethanol in the presence of p-toluenesulfonic acid gave regioselectively 3-aryl-4-trifluoromethyl-5,6,7,8-tetrahydropyrimido[4,5-c]pyridazine-