The palladium(0)‐catalyzed direct construction of bicyclic heterocycles is described. Treatment of propargyl bromides that have nucleophilic functional groups connected by two or three carbon atoms with catalytic [Pd(PPh3)4] affords bis‐cyclization products in good yields. The desired bicyclic heterocycles can be obtained selectively when using substrates with appropriate nucleophilic groups. We also
A stereoselective one-pot synthesis of perhydro-7a-hydroxy-7-phenylthiofurano[3,2-b]pyran via an Acid-catalysed deprotection/double cyclisation/rearrangement sequence
作者:Neil Edwards、Jacqueline A. Macritchie、Philip J. Parsons
DOI:10.1016/s0040-4039(98)00560-7
日期:1998.5
the formation of the title compound as one diastereoisomer (from NMR analysis). The reaction was carried out under thermodynamic conditions, and underwent a double deprotection/double cyclisation/rearrangement sequence.