Chemistry of Heterocyclic Compounds p. 262 - 265 (1982)
Update date:2022-08-04
Topics:
Cheshmaritashvili, M. G.
Samsoniya, Sh. A.
Kurkovskaya, L. N.
Suvorov, N. N.
A 2,2'-diethoxycarbonyl derivative of a new bisindole system, viz., 1,2-(5,5'-diindolyl)ethane, was obtained by cyclization of ethyl pyruvate sym-4,4'-diphenyleneethanedihydrazone. 5-(β-Phenylethyl)-2-ethoxycarbonylindole was also isolated in very low yield from the reaction products.Saponification of the 2,2'-diethoxycarbonyl derivative gave the corresponding dicarboxylic acid, the thermal decarboxylation of which leads to the formation of 1,2-(5,5'-diindolyl)ethane.The syn,syn and anti,anti forms of ethyl pyruvate sym-4,4'-diphenyleneethanedihydrazone were also obtained and characterized.
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