Eine verbesserte Methode zur Darstellung von 1,3,3‐Triethyl‐2‐methylenindolin

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Abstract

An Improved Method for the Synthesis of 1,3,3-Triethyl-2-methyleneindoline 1,3,3-Triethyl-2-methyleneindoline (8) has been synthesized in 40% yield by alkylation of 2-methylindole with iodoethane in ethanol at 100 – 110°C/50 bar using an improved separation procedure. The 1H- and 13C-NMR spectra of 8 and its tetrafluoroborate salt are examined.