The enereaction of N-Phenyl-1,2,4-triazoline-3,5-dione with alkenes shows a remarkable preference for hydrogen abstraction from the group which is geminal to the larger substituent of the double bond. These results require that the dominant effect in the transition state of the enereaction is the nonbonded interactions.
Highly Enantioselective Alkenylation of Glyoxylate with Vinylsilane Catalyzed by Chiral Dicationic Palladium(II) Complexes
作者:Kohsuke Aikawa、Yu̅ta Hioki、Koichi Mikami
DOI:10.1021/ja906164p
日期:2009.10.7
Chiral dicationic palladium complex-catalyzed vinylation and dienylation of glyoxylate with vinylsilanes and dienylsilanes to produce highly optical active allylic alcohols has been achieved. The advantages of this reaction are that the chiralpalladium catalyst is readily employed and that vinylsilanes as nucleophiles are easily synthesized, storable, and air- and moisture-stable.