Helvetica chimica acta

Intramolekulare 1, 3??dipolare Cycloadditionen von Diarylnitriliminen aus 2, 5??Diaryltetrazolen

H Meier, H Heimgartner

文献索引：Meier, Hansruedi; Heimgartner, Heinz Helvetica Chimica Acta, 1985 , vol. 68, p. 1283 - 1300

全文：HTML全文

被引用次数: 27

摘要

Alkenyl-substituted diaryl-nitrile-imines-generated by photolysis or thermolysis of alkenyl- substituted 2, 5-diaryl-tetrazoles-undergo a regioselective intramolecular [2+ 31 cycloaddition to yield new heterocyclic compounds, eg 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 ...