84319-45-9Relevant academic research and scientific papers
Syntheses with Alkenediazonium Salts, V. Synthesis and Structure of 1,3,4-Oxadiazoles, 6H-1,3,4-Oxadiazines, and 5,6-Dihydro-4H-1,3,4-oxadiazines
Saalfrank, Rolf W.,Weiss, Bernhard,Peters, Karl,Schnering, Hans Georg von
, p. 4026 - 4034 (2007/10/02)
Depending on the substituents R1 and R2 the reaction of alkenediazonium salts 1 with carboxylic hydrazides 2 leads to 1,3,4-oxadiazoles 6, 6H-1,3,4-oxadiazines 7, and 5,6-dihydro-4H-1,3,4-oxadiazines 8, respectively.The structures of 6b, 7Be, and 8b were established by X-ray analysis.
Oxidation of Arylacetylhydrazones of Carbonyl Compounds with Lead Tetraacetate
Stephanidou-Stephanatou, J.,Lefkopoulou, S.
, p. 705 - 711 (2007/10/02)
Oxidation of the title compounds 8, 9 with lead tetraacetate at room temperature gives a variety of products depending on the substituents on the carbonyl carbon atom.Thus, on oxidation of the aldehyde derivatives 8 1,3,4-oxadiazolo derivatives 10 are obtained in good yields.However in some cases formation of N-acetyl-N-arylacetyl-N'-benzoylhydrazines 11 is also observed, whereas oxidation of the ketone hydrazones 9 gives in good yields the 2H,5H-1,3,4-oxadiazoles 15 or substituted monoacetoxy- 17 and diacetoxyalkanes 18.The reaction mechanisms are also discussed.
