Yuzhu Yang

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Bimetallic copper-/palladium-catalyzed multicomponent reaction of propargyl carbonates, aryl iodides, and diboron species was studied. This procedure can be used for synthesis of di-, tri-, and tetra-substituted allenes. Using diboronic acid, the reaction is supposed to proceed via allenylboronic acid intermediate.
A Pd-catalyzed regioselective annulation reaction of propargyl carbonates and 2-(pyridine-2-yl) acetonitrile derivatives has been accomplished, which provides a straightforward and efficient access to polysubstituted indolizines. The choice of the phosphine ligand is crucial to the high regio-selectivity of the reaction.
Bimetallic Pd/Cu and Pd/Ag catalytic systems were used for borylation of propargylic alcohol derivatives. The substrate scope includes even terminal alkynes. The reactions proceed stererospecifically with formal SN2' pathways to give allenyl boronates. Opening of propargyl epoxides leads to 1,2-diborylated butadienes probably via en allenylboronate(More)
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