Lipase-Catalyzed Transesterification of 2-Hydroxy-2-(pentafluorophenyl)acetonitrile Leading to (1<i>R</i>,2<i>R</i>)- and (1<i>S</i>,2<i>S</i>)-Bis(pentafluorophenyl)ethane-1,2-diol
作者:Takashi Sakai、Yasushi Miki、Masashi Tsuboi、Hiroaki Takeuchi、Tadashi Ema、Kenji Uneyama、Masanori Utaka
DOI:10.1021/jo9918551
日期:2000.5.1
Optically pure (1R,2R)- and (1S,2S)-1,2-bis(pentafluorophenyl)ethane-1,2-diol (1) were synthesized from key intermediates (R)- and (S)-2-hydroxy-2-(pentafluorophenyl)acetonitrile (2), both of which were prepared by the lipase LIP-catalyzed transesterification (E = 465). The absolute configuration of (S)-2 was determined by X-ray structural analysis after transformation into (S)-alpha-cyano-2,3,4,5
从关键中间体(R)-和(S)-2-羟基合成了光学纯的(1R,2R)-和(1S,2S)-1,2-双(五氟苯基)乙烷-1,2-二醇(1) -2-(五氟苯基)乙腈(2),两者都是通过脂肪酶LIP催化的酯交换反应(E = 465)制备的。(S)-2的绝对构型是在转化为(S)-α-氰基-2,3,4,5,6-五氟苄基(S)-6-甲氧基-α-甲基之后通过X射线结构分析确定的-2-萘乙酸酯(S,S)-9。此外,(S,S)-9的晶体结构具有有趣的井井有条的堆积模式,该模式显示了面对面的堆积反应以及相邻的五氟苯基和6-甲氧基萘基之间的端对端平行接触分子。