Substrate dependent intramolecular palladium-catalysed cyclisation and subsequent β-H elimination or C–H activation: a general method for the synthesis of fused pyran rings
Tetrahedron Letters(2008)
摘要
An efficient and convenient method for the synthesis of fused pyran rings via intramolecular palladium-catalysed cyclisation followed by β-H elimination or C–H activation has been developed. It is possible to utilise this method for the synthesis of benzopyran systems.
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关键词
C–H activation,Benzopyran,Tetracyclic pyran ring,Heterocycles
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