Enantioselective Synthesis of (2R,4'R, 8'R)-.ALPHA.-Tocopherol(Vitamin E) Based on Enzymatic Function.
作者:Masako NOZAWA、Keiko TAKAHASHI、Keisuke KATO、Hiroyuki AKITA
DOI:10.1248/cpb.48.272
日期:——
Syntheses of (S)-chroman-2-carboxaldehyde congener 1 and (S)-chiral isoprene unit 3 were achieved based on the enzymatic acetylation of (+/-)-chroman-2-methanol 6 and (+/-)-(2,3)-anti-2-methyl-3-(p-methoxyphenyl)-1,3-propane diol 12, respectively. Synthesis of the side-chain part corresponding to (3R,7R)-3,7,11-trimethyldodecan-1-ol 27 was achieved by the coupling reaction of (S)-3 and (R)-3,7-dimethyloctyl
基于(+/-)-chroman-2-甲醇6和(+/-)-(的酶促乙酰化反应,实现了(S)-chroman-2-羧醛同源物1和(S)-手性异戊二烯单元3的合成2,3)-抗-2-甲基-3-(对甲氧基苯基)-1,3-丙二醇12。通过(S)-3和(R)-3,7-二甲基辛基碘的偶合反应,合成了对应于(3R,7R)-3,7,11-三甲基十二烷-1-醇27的侧链部分。 4.衍生自(3R,7R)-27和(S)-1的(3R,7R)-salt盐2的Wittig反应得到烯烃28,将其进行催化加氢得到(2R,4′R,8)。 'R)-α-生育酚。