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Synthesis 2005(19): 3189-3190  
DOI: 10.1055/s-2005-918446
SHORTPAPER
© Georg Thieme Verlag Stuttgart · New York

Synthesis of Pyran-2-ones by Reaction of 1,1-Bis(trimethylsilyloxy)ketene Acetals with 3-Silyloxyalk-2-en-1-ones

Ehsan Ullaha, Peter Langer*a,b
a Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059 Rostock, Germany
b Leibnitz-Institut für Organische Katalyse an der Universität Rostock e. V. (IfOK), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
e-Mail: peter.langer@uni-rostock.de;
Further Information

Publication History

Received 15 May 2005
Publication Date:
25 October 2005 (online)

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Abstract

Functionalized pyran-2-ones were prepared in two steps by the reaction of 1,1-bis(trimethylsilyloxy)ketene acetals with 3-silyloxyalk-2-en-1-ones.

Key words

cyclizations - ketene acetals - pyran-2-ones - silyl enol ethers

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All new compounds gave satisfactory spectroscopic and analytical and/or HRMS data.