Synlett 2009(13): 2119-2122  
DOI: 10.1055/s-0029-1217705
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

One-Pot, Three-Component Chemoselective Reaction of Isoquinolines, Dialkyl Acetylenedicarboxylates, and α-Ketolactones: An Unexpected Participation of an Ester Carbonyl Group in the 1,4-Dipolar Cycloaddition Reaction

Abbas Ali Esmaeili*, Mohsen Nazer
Department of Chemistry, University of Birjand, P. O. Box 97175/615, Birjand, Iran
Fax: +98(561)2502009; e-Mail: aa_esmaeili@yahoo.com;
Further Information

Publication History

Received 23 March 2009
Publication Date:
23 July 2009 (online)

Abstract

The reaction of benzofuran-2,3-dione derivatives with dialkyl acetylenedicarboxylates (DAAD) and isoquinoline results in a three-component 1,4-dipolar cycloaddition reaction in which the ester carbonyl group is incorporated into a two-atom assembly to give spiro[1,3]oxazino[2,3-a]isoquinoline derivatives in good yield. This reaction provides the first example of an ester carbonyl group participating in a 1,4-dipolar cycloaddition reaction.