Formation of 1,2,5‐Oxadiazole, Isoxazole, Isothiazole, 1,2,3‐Triazole, and Pyrrole Rings fromN‐(5,5‐Dimethyl‐3‐oxocyclohexenyl)‐S,S‐diphenylsulfilimine
Heterocyclic Rearrangement of 4,5,6,7-Tetrahydro-6,6-dimethyl-benzo[c][1,2,5]oxadiazol-4-one (Z)-Arylhydrazones into Corresponding 2-Aryl-4,5,6,7-tetrahydro-2H-benzo[d][1,2,3]triazol-4-one Oximes
作者:Susan Lefkopoulou、Julia Stephanidou-Stephanatou、Constantine Tsoleridis、Nicholas E. Alexandrou
DOI:10.1002/hlca.19850680630
日期:1985.9.25
The thermal base-catalysed and photochemical transformation (Boulton-Katritzky rearrangement) of the title tetrahydrobenzo[c][1,2,5]oxadiazoles to tetrahydro-2H-benzo[d][1,2,3]triazoles is studied. Attempts to induce analogous rearrangement in tetrahydro-2H-benzo[d][1,2,3]triazol-4-one arylhydrazones or oximes failed. Some CNDO/2 calculation are also carried out.
研究了标题四氢苯并[ c ] [1,2,5]恶二唑向四氢-2 H-苯并[ d ] [1,2,3]三唑的热碱催化光化学转化(Boulton - Katritzky重排)。试图在四氢-2 H-苯并[ d ] [1,2,3]三唑-4-酮芳基azo或肟中诱导类似的重排失败。还执行了一些CNDO / 2计算。
Furazans and furazan oxides. Part II. Preparation and tautomerism of some acyl furoxans; examples of steric hindrance to conformational mobility in alicyclic six-membered rings
作者:J. Ackrell、A. J. Boulton
DOI:10.1039/p19730000351
日期:——
dihydrobenzofurazan-4-one 1-oxides (10a)–(15a) are converted almost completely into the isomeric 3-oxides (10b)–(15b), respectively, on heating. Rate and equilibrium constants for the reaction have been determined. Some chemical transformations of the ketones are described. The dihalogeno-ketones (13) and (14)(a and b) display broadened n.m.r. signals at room temperature, due to slow equilibration between the ‘half-chair’