100083-29-2Relevant academic research and scientific papers
First 1,4-Dipolar Cycloaddition Reactions of 3,6-Dihydro-6-oxo-1-pyrimidinium-4-olates to 1,2,4-Triazoline-3,5-diones
Gotthardt, Hans,Schenk, Karl-Heinz
, p. 4567 - 4577 (2007/10/02)
The synthesis of some novel representatives of the pyrimidinium-4-olates of type 3 and 7, prepared from amidines 2 or 6 and bis(2,4,6-trichlorophenyl) malonates 1, is described.The representatives 3 or 7, which are substituted at the 5-position, react with the 1,2,4-triazoline-3,5-diones 4 even at room temperature to produce high yields of stable primary adducts 5 or 8, respectively, as a result of a 1,4-dipolar cycloaddition reaction, whereas the betaines 3i, j, which are unsubstituted at the 5-position, react with 4 to give the new betaines 9a, b.
