Practical Synthesis of Axially Chiral Dicarboxylates <i>via</i> Pd-Catalyzed External-CO-Free Carbonylation
作者:Hideyuki Konishi、Fumika Hoshino、Kei Manabe
DOI:10.1248/cpb.c16-00486
日期:——
We have developed a safe and practical synthetic method for preparing axially chiral diphenyl dicarboxylates using Pd-catalyzed external-CO-free carbonylation with phenyl formate as a CO surrogate. Optimized conditions consisted of axially chiral [1,1'-binaphthalene]-2,2'-diyl ditriflate and its congeners, each easily prepared from commercially available enantiomerically pure diols, Pd(OAc)2, 1,3-
我们已经开发了一种安全实用的合成方法,可使用Pd催化的外部无CO羰基化(甲酸苯甲酸酯作为CO替代物)来制备轴向手性二苯基二羧酸二乙酯。优化的条件包括轴向手性[1,1'-联萘] -2,2'-二芳基二氟甲磺酸酯及其同类物,每种均可以容易地由对映体纯的二醇,Pd(OAc)2、1,3-双(二苯基膦基)制备丙烷,乙基二异丙基胺,无溶剂。为了证明这些产品的潜在用途,该方法以克为单位进行,并将苯基酯产品转化为其他有用的化合物,并且两种方法均可轻松进行。