A synthesis of S,S-DICHED (dicyclohexylethane-1,2-diol), a C
2-symmetrical chiral director for Matteson homologations, is described. It relies on the insertion of lithiated S-2-cyclohexyloxirane into cyclohexylboronic acid pinacol ester and proceeds in three linear steps from readily available starting materials. No step requires chromatography or any specialized equipment.
S,S-DICHED(二环己基
乙烷-1,2
-二醇)的合成,这是Matteson同系物的C2对称手性向列剂,已经描述。它依赖于将
锂化的S-2-环己氧环氧烷插入环己
硼酸皮纳科酯中,并从易得的起始物料中经过三个线性步骤进行。没有任何步骤需要色谱或任何专门的设备。