Synthesis 2020; 52(19): 2821-2827
DOI: 10.1055/s-0040-1707179
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© Georg Thieme Verlag Stuttgart · New York

Annulations with Butenolides and Phthalides: New Entries to Isocoumarins, 3,4-Dihydroisocoumarins, and Benzofurans

Shuai Wang
,
George A. Kraus
Department of Chemistry, Iowa State University, Ames, IA, 50011, USA   Email: gakraus@iastate.edu
› Author Affiliations
We thank the National Science Foundation (NSF) EAGER funding (Award #1842604) for partial support of this research, and Iowa State University, Department of Chemistry.
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Publication History

Received: 28 April 2020

Accepted after revision: 03 June 2020

Publication Date:
16 July 2020 (online)


Abstract

The reactions of the anions of butenolides and substituted phthalides with sorbate esters and mono-epoxy sorbate esters furnish isocoumarins, 3,4-dihydroisocoumarins, and benzofurans. The yields range from 41% to 71%.

Supporting Information