Synthesis of pyrroloquinolines from alkyl-substituted 6-aminoindoles, acetoacetic ester, and ethoxymethylenemalonic ester
Abstract
Under the conditions of the Vilsmeier reaction and also when boiled in biphenyl aminocrotonates, obtained from 2,3,5-trimethyl- and 1,2,3,5-tetramethyl-6-aminoindoles, are easily converted into the corresponding pyrroloquinolines. Similarly, pyrroloquinolines with structures known to be angular are formed during the thermal cyclization of the products from the reaction of these amines with ethoxymethylenemalonic ester.
How to Cite
Yamashkin, S. A.; Kucherenko, N. Y.; Yurovskaya, M. A. Chem. Heterocycl. Compd. 1997, 33, 59. [Khim. Geterotsikl. Soedin. 1997, 69.]
For this article in the English edition, see DOI https://doi.org/10.1007/BF02290747