Synthese von 1Benzothieno2,3—disoxazol-Derivaten

摘要

Derivatives of 1benzothieno2.3—disoxazole, a new heterocyclic ring system, were synthesized by 1.3-dipolar cyclisations: benzobthiophene-1.1-dioxide and its 3-methyl derivative reacted with nitrile oxides and nitrones to the corresponding substituted 1benzothieno2.3—disoxazolines and-isoxazolidines. Hydrogenolysis of the latter cleaved the isoxazolidine ring, yielding the corresponding 2-(α-phenylamino-benzyl)-3-hydroxy-2.3-dihydro-benzobthiophene-1.1-diox