Synthesis 2013; 45(1): 93-100
DOI: 10.1055/s-0032-1316819
paper
© Georg Thieme Verlag Stuttgart · New York

Structural Reorganization of Allyl Isothiocyanate into Pyrrole Ring under Superbase­: A Straightforward Access to NH-2-(Alkylsulfanyl)-1H-pyrroles and N-Alkyl-2-(alkylsulfanyl)-1H-pyrroles

Nina A. Nedolya
a   A. E. Favorsky Irkutsk Institute of Chemistry of the Russian Academy of Sciences, Siberian Branch, Favorsky Street 1, 664033 Irkutsk, Russian Federation   Fax: +7(3952)419346   Email: boris_trofimov@irioch.irk.ru
,
Lambert Brandsma
b   Julianalaan 273, 3722 GN Bilthoven, The Netherlands
,
Boris A. Trofimov*
a   A. E. Favorsky Irkutsk Institute of Chemistry of the Russian Academy of Sciences, Siberian Branch, Favorsky Street 1, 664033 Irkutsk, Russian Federation   Fax: +7(3952)419346   Email: boris_trofimov@irioch.irk.ru
› Author Affiliations
Further Information

Publication History

Received: 02 September 2012

Accepted after revision: 07 November 2012

Publication Date:
26 November 2012 (online)


Abstract

A novel and facile synthetic route to NH-2-(alkylsulfanyl)-1H-pyrroles and N-alkyl-2-(alkylsulfanyl)-1H-pyrroles is reported. This was achieved by deprotonation of allyl isothiocyanate with the superbasic pair lithium diisopropylamide and potassium tert-butoxide (1:1 molar mixture), followed by intramolecular ring closure, deprotonation of cyclic anion with a second equivalent of the superbase, and final sequential N-protolysis/S-alkylation or N,S-dialkylation of the formed N,S-centered pyrrol-2-ylsulfide dianion.

Supporting Information