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Synlett 2000; 2000(5): 0686-0688
DOI: 10.1055/s-2000-6620
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Regiospecific 4-O-Alkylation of Tetronic Acids with Isoureas

Rainer Schobert* , Sven Siegfried
  • *School of Chemistry, David Keir Building, The Queens University of Belfast, Belfast BT9 5AG, Northern Ireland; Fax + 44 1232 382117; E-mail: r.schobert@qub.ac.uk
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Publication Date:
31 December 2000 (online)

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4-Alkoxy-5H-furan-2-ones (4-O-alkyl tetronates) with various types of substituents at positions C-3, C-5, or C-3 and C-5 were prepared in good yields and under mild conditions from the corresponding parent tetronic acids and readily available isoureas of the respective primary or secondary alcohols. 2-O-Alkylation was not observed in any case. 4-Alkoxycoumarins are accessible likewise.

alkylation - regioselectivity - tetronic acids - isoureas