Chiral (Acyclic Diaminocarbene)Gold(I)-Catalyzed Dynamic Kinetic Asymmetric Transformation of Propargyl Esters
作者:Yi-Ming Wang、Christian N. Kuzniewski、Vivek Rauniyar、Christina Hoong、F. Dean Toste
DOI:10.1021/ja205068j
日期:2011.8.24
A highly enantioselective transformation catalyzed by chiral (acyclic diaminocarbene)gold(I) complexes is reported. The enantioselective synthesis of 2-substituted chromenyl pivalates from racemic phenol-substituted propargyl pivalates was developed. Rearrangement of the substrates in the presence of cationic gold gave allene intermediates, whose cyclization resulted in formation of enantioenriched
报道了手性(无环二氨基卡宾)金(I)配合物催化的高度对映选择性转化。开发了由外消旋苯酚取代的新戊酸炔丙酯对映选择性合成2-取代的新戊酸苯并苯酰的方法。在阳离子金存在下,底物重排得到丙二烯中间体,其环化导致通过动态动力学不对称转化形成对映体富集的产物。