Synlett 2014; 25(13): 1926-1936
DOI: 10.1055/s-0034-1378329
letter
© Georg Thieme Verlag Stuttgart · New York

Synthesis of Pentasubstituted Pyrroles via Catalyst-Free Multicomponent Reactions

Shaik Karamthulla
Department of Chemistry, Indian Institute of Technology Patna, Patna 800 013, Bihar, India   Fax: +91(612)2277383   eMail: lokman@iitp.ac.in
,
Suman Pal
Department of Chemistry, Indian Institute of Technology Patna, Patna 800 013, Bihar, India   Fax: +91(612)2277383   eMail: lokman@iitp.ac.in
,
Md. Nasim Khan
Department of Chemistry, Indian Institute of Technology Patna, Patna 800 013, Bihar, India   Fax: +91(612)2277383   eMail: lokman@iitp.ac.in
,
Lokman H. Choudhury*
Department of Chemistry, Indian Institute of Technology Patna, Patna 800 013, Bihar, India   Fax: +91(612)2277383   eMail: lokman@iitp.ac.in
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Publikationsverlauf

Received: 14. März 2014

Accepted after revision: 23. Mai 2014

Publikationsdatum:
10. Juli 2014 (online)


Abstract

A facile and versatile catalyst-free method for the preparation of a wide range of pentasubstituted pyrroles has been reported using four-component reactions of arylglyoxal monohydrate, β-keto esters, amines, and various cyclic 1,3-dicarbonyls under mild reaction conditions. Employing this methodology, pseudo seven-component reactions have also been achieved in the case of p-phenylenediamine to provide conjugated bispyrroles with arene spacers.

Supporting Information