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The directed lithiation of some 3-acylchromone acetals

✍ Scribed by G.Elena Daia; Christopher D. Gabbutt; John D. Hepworth; B.Mark Heron; David E. Hibbs; Michael B. Hursthouse

Publisher: Elsevier Science
Year: 1998
Tongue: French
Weight: 228 KB
Volume: 39
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(97)10733-x

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✦ Synopsis

3-Acylchromone acetals are lithiated at C-2. Subsequent electrophilic trapping gives chtomones 4 together with a ting-conwacted rimer 6. During the formation of some acetals, an acidcatalysed rearrangement to a 2-substituted 3-fotmylchromone acetal is observed.

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