Synthesis 2015; 47(03): 343-350
DOI: 10.1055/s-0034-1379397
paper
© Georg Thieme Verlag Stuttgart · New York

Facile, Diversity-Oriented, Normal-Electron-Demand Diels–Alder Reactions of 6-Amino-2H-pyran-2-ones with Diethyl Acetylene­dicarboxylate, 1,4-Naphthoquinone, and N-Phenylmaleimide

Adil I. Khatri
Department of Chemistry, Institute of Chemical Technology, N. M. Parekh Road, Matunga, Mumbai 400019, India   Fax: +91(22)22692102   Email: samantsd@yahoo.com   Email: sd.samant@ictmumbai.edu.in
,
Shriniwas D. Samant*
Department of Chemistry, Institute of Chemical Technology, N. M. Parekh Road, Matunga, Mumbai 400019, India   Fax: +91(22)22692102   Email: samantsd@yahoo.com   Email: sd.samant@ictmumbai.edu.in
› Author Affiliations
Further Information

Publication History

Received: 11 August 2014

Accepted after revision: 13 October 2014

Publication Date:
13 November 2014 (online)


Abstract

A series of 6-amino-4-methoxyphenyl-2H-pyran-2-ones, having an electron-rich diene system, capable of undergoing normal-electron-demand (NED) Diels–Alder reaction, were synthesized. The Diels–Alder reaction of these pyrones with electron-deficient dienophiles – diethyl acetylene dicarboxylate, 1,4-naphthoquinone, and N-phenylmaleimide – followed three different pathways and gave structurally diverse products, aminobenzenes, aminoanthraquinones, and aminopolycyclic diimides, respectively. The amino group at the 6-position activated substantially the pyrone ring towards NED Diels–Alder reaction and the reaction has a potential to generate great structural diversity.