Rearrangement of 3,3-Disubstituted 1-Aryl-4,5-dihydro-5-oxo-3H-1,2,4-triazolium Tetrafluoroborates; Part 1. A Versatile Synthesis of 1,5-Disubstituted 2-Aryl-1,2-dihydro-3H-1,2,4-triazol-3-one Tetrafluoroborates
α-(Arylazo)alkyl isocyanates 3 react with tetrafluoroboric acid to yield 3,3-disubstituted 1-aryl-4,5-dihydro-5-oxo-3H-1,2,4-triazolium tetrafluoroborates 4.These compounds rearrange under mild conditions and in good yields to the tetrafluoroborates of 1,
Gstach, Hubert,Seil, Patrick
p. 803 - 808
(2007/10/02)
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