Synthesis 2012; 44(13): 2084-2090
DOI: 10.1055/s-0031-1290383
paper
© Georg Thieme Verlag Stuttgart · New York

Transition-Metal-Free Stereoselective and Regioselective Hydroamination of 2-Benzoylethynyl-4,5,6,7-tetrahydroindoles with Amino Acids

Lyubov N. Sobenina
A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033, Irkutsk, Russian Federation, Fax: +7(3952)419346   Email: boris_trofimov@irioch.irk.ru
,
Denis N. Tomilin
A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033, Irkutsk, Russian Federation, Fax: +7(3952)419346   Email: boris_trofimov@irioch.irk.ru
,
Igor A. Ushakov
A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033, Irkutsk, Russian Federation, Fax: +7(3952)419346   Email: boris_trofimov@irioch.irk.ru
,
Albina I. Mikhaleva
A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033, Irkutsk, Russian Federation, Fax: +7(3952)419346   Email: boris_trofimov@irioch.irk.ru
,
Boris A. Trofimov*
A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Str., 664033, Irkutsk, Russian Federation, Fax: +7(3952)419346   Email: boris_trofimov@irioch.irk.ru
› Author Affiliations
Further Information

Publication History

Received: 01 March 2012

Accepted after revision: 27 April 2012

Publication Date:
14 June 2012 (online)


Abstract

A new family of unnatural amino acids possessing a tetrahydroindole moiety is obtained by nucleophilic addition of various amino acids to the triple bond of 2-benzoylethynyl-4,5,6,7-tetrahydroindoles. The reaction proceeds chemo-, regio- and stereospecifically in the presence of sodium hydroxide to give the Z-isomeric products in 35–72% yields.