Synthesis of 4,5'-dihydro derivatives of benzodifurazan, benzodifuroxan, and benzofurazanofuroxan
作者:V. A. Samsonov、L. B. Volodarskii
DOI:10.1007/bf00486813
日期:1991.10
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’