Synthesis 2022; 54(04): 1134-1144
DOI: 10.1055/a-1681-4164
paper

Functionalized Bipyrroles and Pyrrolyl-Aminopyrones from Acylethynylpyrroles and Diethyl Aminomalonate

Maxim D. Gotsko
a   A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St., Irkutsk 664033, Russian Federation
,
Ivan V. Saliy
a   A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St., Irkutsk 664033, Russian Federation
,
Lyubov N. Sobenina
a   A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St., Irkutsk 664033, Russian Federation
,
Igor A. Ushakov
a   A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St., Irkutsk 664033, Russian Federation
,
Victoriya V. Kireeva
b   Biomedical Research and Technology Department of the Irkutsk Scientific Center of the Russian Academy of Sciences, 283 Lermontov Str., 664033 Irkutsk, Russian Federation
,
Boris A. Trofimov
a   A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St., Irkutsk 664033, Russian Federation
› Institutsangaben
This work was supported by the Russian Science Foundation (grant no. 19-73-10063).


Abstract

An efficient method for the synthesis of 1H,1′H-2,3′-bi­pyrroles (up to 72% yield) by the cyclocondensation of easily available 2-(acylethynyl)pyrroles with diethyl aminomalonate hydrochloride has been developed. The reaction proceeds under reflux in MeCN (6 h) in the presence of Cs2CO3. Under the same conditions, 2-(acylethynyl)pyrroles with bulky (benzyl and octyl) substituents at nitrogen atom react with diethyl aminomalonate to afford 1H,2′H-2,3′-bipyrroles and pyrrolyl-aminopyrones.

Supporting Information



Publikationsverlauf

Eingereicht: 05. Oktober 2021

Angenommen: 28. Oktober 2021

Accepted Manuscript online:
28. Oktober 2021

Artikel online veröffentlicht:
14. Dezember 2021

© 2021. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany