骨化二醇杂质A(EP) | 22145-68-2

• 物质功能分类: 天然产物 - 甾体化合物
• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 类固醇和类固醇衍生物
• 中文名称: 骨化二醇杂质A(EP)
• 英文名称: Cholesta-5,7-dien-3β,25-diol
• 英文别名: 25-HydroxyluMisterol3；17-(6-hydroxy-6-methylheptan-2-yl)-10,13-dimethyl-2,3,4,9,11,12,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3-ol
• CAS: 22145-68-2；61585-29-3；77647-49-5
• 化学式: C₂₇H₄₄O₂
• 分子量: 400.645
• InChiKey: JJFYNCJHSCTBPW-UHFFFAOYSA-N

物化性质

• 熔点：
  169-171 °C
• 沸点：
  527.0±43.0 °C(Predicted)
• 密度：
  1.05±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  6.2
• 重原子数：
  29
• 可旋转键数：
  5
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.85
• 拓扑面积：
  40.5
• 氢给体数：
  2
• 氢受体数：
  2

文献信息

• NOVEL METHOD FOR SYNTHESIZING 25-OH CHOLESTEROL/CALCIFEDIOL FROM PHYTOSTEROL
  申请人：FERMENTA BIOTECH LIMITED

  公开号：US20220204547A1

  公开（公告）日：2022-06-30

  The present invention discloses novel method for synthesizing vegan 25-OH cholesterol/Calcifediol from inexpensive crude phytosterol. According to the method, Phytosterols are reacted to form corresponding i-steroid through tosylation and methanolysis. i-steroid on reductive ozonolysis to C-22 alcohol and conversion via C-22 tosylate to C-22 iodide in good yield. Coupling of C-22 tosylate with Grignard reagent of 4-bromo-2-methyl-2-[(trimethylsilyl)oxy]butane followed by deprotection yielded 25-OH cholesterol. In a process variant, nickel mediated conjugate addition of C-22 iodide to an electron deficient alkene ethyl acrylate and treating corresponding ester with methyl magnesium bromide as means of installing the side chain of 25-OH cholesterol in high yield. Further bromination reaction of 25-OH cholesterol diacetate followed by dehydrobromination using TBAF yielded 25-OH 7-dehydrocholesterol. Further photo reaction of 25-OH 7-dehydrocholesterol in to previtamin D3 using high or medium pressure mercury lamp and subsequent thermal reaction of previtamin D3 to 25-OH vitamin D3 (Calcifediol) in good yield.