Development of Axially Chiral Cyclo-Biaryldiol Ligands with Adjustable Dihedral Angles
作者:Pengxiang Zhang、Jipan Yu、Fei Peng、Xudong Wu、Jiyang Jie、Can Liu、Hua Tian、Haijun Yang、Hua Fu
DOI:10.1002/chem.201603706
日期:2016.11.21
A new type of axially chiral cyclo‐[1,1′‐biphenyl]‐2,2′‐diol (CYCNOL) ligands with adjustable dihedral angles have been developed by varying the bridge chain length. Eight‐, nine‐ and ten‐membered cyclo‐ligands were prepared and evaluated by using two representative examples: enantioselective additions of diethylzinc to aldehydes and organometallic reagents to enones. The results revealed that the
通过改变桥链长度,开发了一种新型的具有可调节二面角的轴向手性环-[1,1'-联苯] -2,2'-二醇(CYCNOL)配体。制备了八元,九元和十元环配体,并通过两个代表性实例进行了评估:将二乙基锌对醛进行对映选择性加成,将有机金属试剂对烯酮进行加成。结果表明,通过改变桥链长度来精细调节二面角在不对称合成中是有效的。