Synthesis 2015; 47(10): 1390-1398
DOI: 10.1055/s-0034-1380154
paper
© Georg Thieme Verlag Stuttgart · New York

One-Pot Synthesis of Highly Functionalized Benzimidazolylisophthalates and (2E)-2-Ethylidene-(1H)-pyridinecarboxylates by Ultrasound-Promoted Multicomponent Reactions

Nicolaos Eleftheriadis
a   Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Macedonia, Greece   Email: ioulia@chem.auth.gr   Email: tsolerid@chem.auth.gr
,
Paraskevi M. Kasapidou
a   Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Macedonia, Greece   Email: ioulia@chem.auth.gr   Email: tsolerid@chem.auth.gr
,
Julia Stephanidou-Stephanatou*
a   Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Macedonia, Greece   Email: ioulia@chem.auth.gr   Email: tsolerid@chem.auth.gr
,
Constantinos A. Tsoleridis*
a   Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Macedonia, Greece   Email: ioulia@chem.auth.gr   Email: tsolerid@chem.auth.gr
,
Dimitra J. Hadjipavlou-Litina
b   Department of Pharmaceutical Chemistry, School of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki 54124, Macedonia, Greece
,
Christos Kontogiorgis
b   Department of Pharmaceutical Chemistry, School of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki 54124, Macedonia, Greece
c   Department of Human Nutrition & Dietetics, Alexander Technological Educational Institute, P. O. Box 141, 57400 Thessaloniki, Macedonia, Greece
,
Agathi Pritsa
c   Department of Human Nutrition & Dietetics, Alexander Technological Educational Institute, P. O. Box 141, 57400 Thessaloniki, Macedonia, Greece
,
Athanasios Papadopoulos
c   Department of Human Nutrition & Dietetics, Alexander Technological Educational Institute, P. O. Box 141, 57400 Thessaloniki, Macedonia, Greece
› Author Affiliations
Further Information

Publication History

Received: 18 November 2014

Accepted after revision: 15 January 2015

Publication Date:
04 March 2015 (online)


Abstract

Reaction of 3-formylchromones, 2-aminobenzimidazole, and acetonedicarboxylates under ultrasound irradiation afforded alkyl 2-(1H-benzimidazol-2-ylamino)-5-(2-hydroxyaroyl)isophthalates as the only reaction product in almost quantitative yields. However, when 2-aminobenzimidazole was replaced by aromatic amines novel alkyl 1-aryl-2-[(E)-2-alkoxy-2-oxoethylidene]-5-(2-hydroxyaroyl)-(1H)-pyridine-3-carboxylates were isolated in good yields. A plausible mechanistic scheme for the formation of the isolated isophthalates and pyridine carboxylates is proposed, and full assignment of all their 1H and 13C NMR chemical shifts has been unambiguously achieved. In addition, the lipid peroxidation inhibition of the novel isophthalate derivatives was evaluated, and it was found that one such derivative presents an interesting antilipid peroxidation activity.

Supporting Information