Asymmetric hydrogenation of 2-fluoro-2-alkenoic acids catalyzed by Ru-binap complexes: A convenient access to optically active 2-fluoroalkanoic acids
作者:Masahiko Saburi、Liming Shao、Tsuyoshi Sakurai、Yasuzo Uchida
DOI:10.1016/s0040-4039(00)74767-8
日期:1992.12
Asymmetric hydrogenation of (Z)-2-fluoro-2-alkenoic acid, (Z)-1a and (Z)-1b, was carried out, employing Ru2Cl4(binap)2(NEt3) as a catalyst to afford 2-fluoroalkanoic acids, 2a and 2b, having high enantiomeric purities (up to 90% e.e.) When the (R)-binap catalyst was used, not only (Z)-1a but (E)-1a was hydrogenated smoothly to give (R)-2a with comparable asymmetric induction.
的不对称氢化(ż)-2-氟-2-烯酸,(Ž) - 1A和(Ž) - 1B,进行,采用的Ru 2氯4(BINAP)2(净3)作为催化剂,得到2- fluoroalkanoic羧酸,图2a和2b中,具有高对映体纯度(高达90%ee)的当(ř使用)-BINAP催化剂,不仅(ż) - 1A但(ë) - 1A顺利氢化,得到(R)-2a具有相当的不对称感应。