Asymmetric catalytic carbon–carbon bond formations in a fluorous biphasic system based on perfluoroalkyl-BINOLs
作者:Yuan Tian、Qing Chuan Yang、Thomas C.W. Mak、Kin Shing Chan
DOI:10.1016/s0040-4020(02)00218-1
日期:2002.5
active 1,1′-binaphthols (BINOLS) substituted at the 4,4′; 6,6′ and 4,4′,6,6′ positions with perfluoroalkyl groups have been synthesized. Asymmetric diethylzinc and triethyl aluminum addition to aryl aldehydes in a fluorous biphasic system catalyzed by these perfluoroalkyl-BINOL–titanium complexes have been accomplished with good enantiomeric excess obtained.
在4,4'处取代的旋光1,1'-联萘酚(BINOLS); 已经合成了具有全氟烷基的6,6'和4,4',6,6'位置。在这些全氟烷基-BINOL-钛络合物催化的氟双相体系中,芳基醛中的芳基醛不对称二乙基锌和三乙基铝的加成反应对映体过量,取得了良好的效果。