Synthesis and cycloadditions of 9H-furo[3,4-b][1]benzo(thio)pyran-9-ones: Furan ring formation by a novel hydrolytically induced cycloreversion
C-2 lithiation of acetals 2 followed by trapping with aldehydes gives 3. Subsequent unmasking of the acetal function provides furobenzo(thio)pyrans 4, cycloadditions of which have been investigated.
Daia, G.Elena,Gabbutt, Christopher D.,Hepworth, John D.,Heron, B.Mark,Hibbs, David E.,Hursthouse, Michael B.
p. 4507 - 4510
(2007/10/03)
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