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
摘要:
An efficient and convenient method for the synthesis of fused pyran rings via intramolecular palladium-catalysed cyclisation followed by beta-H elimination or C-H activation has been developed. It is possible to utilise this method for the synthesis of benzopyran systems. (C) 2007 Elsevier Ltd. All rights reserved.