cad a22 4500 316949574 20181103043304.0 cr unu---uuuuu 140620s1985 xx s 000 0 ger 10.5167/uzh-96605 doi 10.1002/hlca.19850680524 doi (ZORA)oai:www.zora.uzh.ch:96605 540 ddc Meier Hansruedi Intramolekulare 1,3-dipolare Cycloadditionen von Diarylnitriliminen aus 2,5-Diaryltetrazolen [Elektronische Daten] [Hansruedi Meier, Heinz Heimgartner] closedAccess eu-repo Alkenyl-substituted diaryl-nitrile-imines - generated by photolysis or thermolysis of alkenyl-substituted 2,5-diaryl-tetrazoles - undergo a regioselective intramolecular [2+3] cycloaddition to yield new heterocyclic compounds, e.g. fused 2-pyrazolines. With alkinyl derivatives, the corresponding pyrazoles have been formed. UV evidence is given for the intermediate nitrile-imine at - 190°. The latter can be trapped using an excess of carboxylic acid (UV evidence for a new intermediate at - 120°). In this case, the corresponding rearranged addition product N'-acyl-N'-aryl-benzohydrazide is isolated in good yield. Department of Chemistry zora Physical and Theoretical Chemistry, Inorganic Chemistry, Organic Chemistry, Biochemistry, Drug Discovery, Catalysis zora Heimgartner Heinz joint author Helvetica Chimica Acta 68(5):1283-1300 https://www.zora.uzh.ch/id/eprint/96605/1/94_Meier_HCA_1985.pdf text/html WWW-Backlink auf das Repository 1 Journal Article PeerReviewed zora ZORA 856 40 https://www.zora.uzh.ch/id/eprint/96605/1/94_Meier_HCA_1985.pdf text/html WWW-Backlink auf das Repository ZORA 100 1- Meier Hansruedi ZORA 700 1- Heimgartner Heinz joint author ZORA 773 0- Helvetica Chimica Acta 68(5):1283-1300 BK010053 XK010053 XK010000 ZORA ZORA ZORA Journal Article closedAccess