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
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Publikationsverlauf

Received: 01. März 2012

Accepted after revision: 27. April 2012

Publikationsdatum:
14. Juni 2012 (online)


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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.