dl-α-tocopheryl acetate | 186537-57-5

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: dl-α-tocopheryl acetate
• 英文别名: (2RS,4'R,8'R)-O-Acetyl-α-tocopherol；3,4-dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-2H-benzopyran-6-yl acetate；DL-α-tocopherol acetate；vitamin-E-acetate；(RS,R,R)-α-tocopheryl acetate；Tocopheryl acetate；[2,5,7,8-tetramethyl-2-[(4R,8R)-4,8,12-trimethyltridecyl]-3,4-dihydrochromen-6-yl] acetate
• CAS: 186537-57-5
• 化学式: C₃₁H₅₂O₃
• 分子量: 472.752
• InChiKey: ZAKOWWREFLAJOT-ADUHFSDSSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  10.8
• 重原子数：
  34
• 可旋转键数：
  14
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.77
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  dl-α-tocopheryl acetate 生成 D-alpha-生育酚醋酸酯
  参考文献：
  名称：

  Process for separating tocopherol epimers

  摘要：

  公开号：

  US03344151A1
• 作为产物：
  描述：

  (2S,4’R,8’R)-alpha-生育酚 生成 dl-α-tocopheryl acetate
  参考文献：
  名称：

  XAMAMURA, KITISABURO;AKASAKA, MITSUDZO;YAMAGISI, JODZI

  摘要：

  DOI：

文献信息

• [EN] MANUFACTURE OF TOCOPHERYL ACETATE<br/>[FR] FABRICATION D'ACETATE DE TOCOPHERYLE
  申请人：DSM IP ASSETS BV

  公开号：WO2004046126A1

  公开（公告）日：2004-06-03

  A process for the manufacture of 3-phytyl-2,5,6-trimethylhydroquinone-l-acetate, and optionally therefrom tocopheryl acetate, comprises either C-alkylating 2,3,6-trimethylhydroquinone-l-acetate with isophytol or phytol in the presence of a sulphur(VI) containing catalyst of the formulaR1SO2OH, wherein Rl signifies hydroxy, halogen, lower alkyl, halogenated lower alkyl or aryl, in an aprotic organic solvent, or O-alkylating 2,3,6-trimethylhydroquinone-l-acetate with a phytyl halide in a polar aprotic organic solvent in the presence of a base, and subjecting the so-obtained 4-O-phytyl-2,3,6-trimethylhydroquinone-l-acetate to a rearrangement reaction, and in each case optionally submitting the so-obtained 3-phytyl-2,5,6-trimethylhydroquinone-l-acetate to a ring closure reaction to produce tocopheryl acetate. The invention also includes the novel compound 3-phytyl-2,5,6-trimethylhydroquinone-l-acetate and certain stereoisomers thereof, and also the further novel compound 4-hydroxy-2,3,6-trimethyl-5-[3-(4,8,12-trimethyltridecyl)-but-3enyl]phenyl acetate which itself is one of several isomers of 3-phytyl-2,5,6- trimethylhydroquinone-l-acetate formed by isomerization under the influence of heating, e.g. during its distillation as part of the isolation and purification procedure following its manufacture as indicated above. (All-rac)-α -tocopherol, which may be derived from its acetate, is known to be the most active industrially important member of the vitamin E group.

  一种制备3-辅酰基-2,5,6-三甲基对羟基苯甲酸-1-乙酸酯的工艺，以及可选择性地由此制备生育酚乙酸酯，包括将2,3,6-三甲基对羟基苯甲酸-1-乙酸酯在含有符合R1SO2OH式的硫(VI)催化剂的无极性有机溶剂中与异生育醇或生育醇进行C-烷基化，其中R1表示羟基、卤素、低烷基、卤代低烷基或芳基，或者在极性无极性有机溶剂中，在碱的存在下，将2,3,6-三甲基对羟基苯甲酸-1-乙酸酯与生育醇卤化物进行O-烷基化，并将所得的4-O-生育醇-2,3,6-三甲基对羟基苯甲酸-1-乙酸酯进行重排反应，然后可选择性地将所得的3-辅酰基-2,5,6-三甲基对羟基苯甲酸-1-乙酸酯进行环闭合反应以产生生育酚乙酸酯。该发明还包括新型化合物3-辅酰基-2,5,6-三甲基对羟基苯甲酸-1-乙酸酯及其某些立体异构体，以及进一步的新型化合物4-羟基-2,3,6-三甲基-5-[3-(4,8,12-三甲基十三烷基)-丁-3-烯基]苯乙酸酯，它本身是在受热影响下异构化形成的3-辅酰基-2,5,6-三甲基对羟基苯甲酸-1-乙酸酯的若干异构体之一，例如在其作为随后其制备过程中的分离和纯化过程的一部分的蒸馏过程中。从其乙酸酯中提取的(全反)-α-生育醇被认为是维生素E类中最活跃的工业重要成员。
• Weichet; Hodrova, Collection of Czechoslovak Chemical Communications, 1957, vol. 22, p. 595,597
  作者：Weichet、Hodrova

  DOI：——

  日期：——