Oxidation reaction of phenylhydrazine with sodium periodate. I. Oxidation reaction of phenylhydrazine with sodium periodate in various ethers.

Synthesis, oxidation and dehydrogenation of cyclic N,O‐ and N,S‐acetals. Part III. Transformation of N,O‐acetals: 3‐acyl‐1,3,4‐oxadiazolines

“…Hypervalent iodine oxidation [32] has been reported to transform alkoxycarbonyl (ald)imines into oxazoles with C O bond formation [33], but to rearrange 2 -oxazolines with C O bond cleavage [34]. Transformation of arylhydrazines [35] and hydrazones [36] into ethers, as well as carboxylic acid hydrazides into N,N-diacylhydrazines [37], heterocyclization of hydrazones with C N [38] or N N [39] bond formation, degradation of carboxylic acid hydrazides [40] to parent acids, Hofmanntype rearrangement [41] or conversion of carboxamides to hydrazines with N N bond formation [42], regeneration of the carbonyl from (acyl)hydrazones [43], from oximes [44], and from dithianes [45] have also been described.…”