Transition Metals Catalyzed Nucleophilic Addition And Carbonylative Polymerization

1.Pd(Ⅱ)/Bipyridine Catalyzed Conjugate Addition of Arylboronic Acides to α, β-Unsaturated AmidesWe developed and optimized Pd(Ⅱ)/bipyridine catalyzed conjugate addition of arylboronic acids to α, β-unsaturated amides. The catalyzed system was Pd(OAc)2/bpy, the solvents were HOAc, THF and H2 O. And the reaction was preceded smoothly in air. A series of arylboronic acids and α, β-unsaturated amides substrates were surveyed, and modest to excellent yields were given.2.Cobalt-Catalyzed Carbonylative Polymerization of Tetrahydrofuran and AldehydesWe surveyed carbonylative polymerization of tetrahydrofuran to synthesize polyester, and a series of Lewis acids and Lewis bases were tested as co-catalysts. We obtained some polyester with low molecular weight in our optimized reaction conditions. Meanwhile, we optimized the carbonylative polymerization of trioxane in the presence of cobalt complexes.The carbonylative polymerization of other aldehydes was also explored.