The Boulton-Katritzky rearrangement of isocarboxazid
(Chemical Equation Presented) Isocarboxazid rearranges on heating to 5-acetonyl-2-benzyl-4-hydroxy-1,2,3-triazole in DMF at 150°C, in the ionic liquid, [bmin]HSO4- at 100°C or as a melt at 105°C. This is the first reported example of the Boulton-Katritzky rearrangement of an acyl hydrazide.