Synthesis of acetyldimethyl(phenyl) silane and its enantioselective conversion into (R)-(1-hydroxyethyl) dimethyl(phenyl) silane by plant cell suspension cultures of Symphytum officinale L. and Ruta graveolens L.
作者:Reinhold Tacke、Stephan A. Wagner、Susanne Brakmann、Frank Wuttke、Udo Eilert、Lutz Fischer、Christoph Syldatk
DOI:10.1016/0022-328x(93)80452-h
日期:1993.10
Starting from chlorodimethyl(phenyl)silane (3), acetyldimethyl(phenyl)silane (1) was prepared by a two-step synthesis in a total yield of 90% [PhMe2SiCl (3) → PhMe2SiC(OMe)=CH2 (4) → PhMe2SiC)(O)Me (1)]. The prochiral acetylsilane 1 was transformed enantioselectively into (R)-(1-hydroxyethyl)dimethyl(phenyl)silane [(R)-2] using plant cell suspension cultures of Symphytum officinale L. or Ruta graveolens
由氯二甲基(苯基)硅烷(3)开始,通过两步合成制备乙酰二甲基(苯基)硅烷(1),总产率为90%[PhMe 2 SiCl(3)→PhMe 2 SiC(OMe)= CH 2(4)→PhMe 2 SiC)(O)Me(1)]。前手性acetylsilane 1被映选择性地转化成(- [R )- (1-羟乙基)二甲基(苯基)硅烷[([R )- 2 ]的使用的植物细胞悬浮培养物聚合草L.或芸L.在制备条件下(300 mg规模,未优化),分别以15%(Symphytum)和9%收率(Ruta)分离(R)-2。产品的对映体纯度分别为81%ee(Symphytum)和60%ee(Ruta)。