Synthesis of All Four Stereoisomers of (E)-Vitamin KT (Phylloquinone), Analysis of Their Diastereoisomeric and Enantiomeric Purities and Determination of Their Biopotencies
作者:Rudolf Schmida、Syméon Antoulas、August Rüttimann、Max Schmid、Max Vecchi、Harald Weiserb
DOI:10.1002/hlca.19900730517
日期:1990.8.8
procedure. A HPLC method was developed which separates with remarkable efficiency all four stereoisomers of (E)- as well as three out of the four stereoisomers of (Z)-vitamin K1 on optically active poly(trityl methacrylate) as the chiral stationary phase supported on Nucleosil. By this method, the stereoisomeric content of the stereoisomers 1b-d synthesized was shown to be in the range of 96-98 %,
(E)-维生素Kb的所有四个立体异构体,即(2 1 E,7 R,11 1 R)-1(= 1a),(2 1 E,7 1 R,l 1 S)-1(= 1b), (2 1 E,7 1 S,11 1 S)1(= 1c)和(2 1 E,7 1 S,11 1 R)-1(= Id)以高化学状态合成。立体异构体纯度。立体异构体lb-d的合成依赖于使用光学活性的Cf 1 *和C * 10-结构单元(R)-或(S)-4-(苄氧基)-3-甲基丁醛((R)-或(S)-2)和(R)-或(S)-香茅醛((R)-或(S)-3),它们已通过Rh 1催化的烯丙胺-烯胺异构化技术得到固定。为了合成天然(E)-维生素K1立体异构体1a,基于O-烷基化/重排程序,开发了从天然菲醇开始的新途径。已开发出一种高效液相色谱法,该方法可高效分离(E)的所有四种立体异构体,以及(Z)-维生素K 1的四种立体异构体中的三种在Nucleosil