Affiliation:
1. Institut für Organische Chemie der Universität Graz, Abteilung für Organische Chemie I
Abstract
2-Dicyanomethylene-1,3-indandione reacts with 2,6-disubstituted anilines to give aminophenyl-1,3-dioxo-2-indanyl-malononitriles. By heating or by photolysis HCN is eliminated from the adducts and deeply coloured aminophenyl-1,3-dioxo-2-indanylideneacetonitriles are formed. They are classified as merocyanine type polymethines. The irreversible change in colour occurs at temperatures above 70 °C, the adducts are therefore capable of indicating temperatures. Reaction of phenols with 2-dicyanomethylene-1,3-indandione yields hydroxyphenyl-1,3-dioxo-2-indanylideneacetonitriles, oxonole type polymethines with the properties of pH-indicators.
Cited by
17 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献