Oximes of Alkyl Hetaryl Pyrroles

3- 18 h) affords the corresponding 0-vinyl oximes. The latter, in the presence of a superbase catalyst and in the absence of acetylene, are converted at 100°C-105°C (8-10 h) into 2-(3-indolyl)pyrroles. The yields of indolylpyrroles range 29%-36%. 

SCHEME 1.54 Two-step synthesis of 2-(2-anthryl)pyrrole from 2-acetylanthracene oxime and acetylene via O-vinyl oxime. 

SCHEME 1.55 Reaction of 2-acetyl-N-methylpyrrole oxime with acetylene. 

The first data on behavior of furyl ketoximes in the Trohmov reaction have been published in works [231,232] where it was reported the synthesis of 3-alkyl-2-(2-furyl)-N-vinylpyrroles [231] and peculiarities of the spin-spin conpling in their H NMR spectra [232]. 

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