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2006
Pyran derivativesR 0340 Synthesis of Pyran-2-ones by Reaction of 1,1-Bis(trimethylsilyloxy)ketene Acetals
with 3-Silyloxyalk-2-en-1-ones. — A two-step condensation/cyclization reaction of 1,1-bis(silyloxy)ketene acetals (I) with 3-siloxyalk-2-en-1-ones (II) offers a moderately efficient synthesis of tri- and tetrasubstituted pyran-2-ones (IV) (11 examples). — (ULLAH, E.; LANGER*, P.; Synthesis 2005, 19, 3189-3190; Inst. Chem., Univ. Rostock, D-18059 Rostock, Germany; Eng.) — Mais
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