作者:Valerie H. L. Wong、Andrew J. P. White、T. S. Andy Hor、King Kuok Mimi Hii
DOI:10.1002/adsc.201500610
日期:2015.12.14
is observed in the cyclization of propargylic amides catalyzed by bis(pyridyl)silver(I) complexes, with an unexpected reversal of electronic demand to the analogous NH addition reaction. The catalyst was found to be effective for internal alkyne substrates, offering exclusive selectivity for the 5-exo-dig product. Differences in selectivity profile between gold- and silver-catalyzed processes are highlighted
在双(吡啶基)银(I)配合物催化的炔丙基酰胺环化过程中观察到配体促进作用,电子需求意外逆转至类似的NH加成反应。发现该催化剂对内部炔烃底物有效,为5 -exo-dig产物提供了独特的选择性。重点讨论了金和银催化工艺之间选择性分布的差异。