3-β-cholestanyl 2,3,5-tri-O-benzyl-β-D-ribofuranoside | 86883-44-5

• 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
• 英文名称: 3-β-cholestanyl 2,3,5-tri-O-benzyl-β-D-ribofuranoside
• 英文别名: 3β-cholestanyl 2,3,5-tri-O-benzyl-β-D-ribofuranoside；(2R,3R,4R,5R)-2-[[(3S,5S,8R,9S,10S,13R,14S,17R)-10,13-dimethyl-17-[(2R)-6-methylheptan-2-yl]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl]oxy]-3,4-bis(phenylmethoxy)-5-(phenylmethoxymethyl)oxolane
• CAS: 86883-44-5
• 化学式: C₅₃H₇₄O₅
• 分子量: 791.168
• InChiKey: TTYGAVMDSWYQCF-QFZSICEWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  13.9
• 重原子数：
  58
• 可旋转键数：
  17
• 环数：
  8.0
• sp3杂化的碳原子比例：
  0.66
• 拓扑面积：
  46.2
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  2,3,5-三-O-(苯基甲基)-D-呋喃核糖 在 吡啶 、 triphenylmethyl perchlorate 作用下， 以 乙二醇二甲醚 为溶剂， 生成 3-β-cholestanyl 2,3,5-tri-O-benzyl-β-D-ribofuranoside
  参考文献：
  名称：

  在三苯甲基高氯酸存在下，由相应的 1-O-酰基糖和醇轻松合成 α-葡萄糖苷和 α-核糖苷

  摘要：

  在高氯酸三苯甲基酯存在下，1-O-溴乙酰-β-D-葡萄糖与醇发生立体选择性反应，以良好的收率得到相应的α-葡萄糖苷。1-O-乙酰基-β-D-核糖的类似反应仅提供相应的 β-核糖苷，而在分子筛 4A 和高氯酸锂的存在下，主要以良好的收率制备 α-核糖苷。

  DOI：

  10.1246/cl.1984.907

文献信息

• Tandem Catalysis Strategy for Direct Glycosylation of 1-Hydroxy Sugars. Methoxyacetic Acid as an Effective Catalytic Mediator
  作者：Yasuo Yokoyama、Junji Inanaga、Takeshi Hanamoto、Shoko Suzuki、Hiroshi Furuno、Kosuke Shimizu

  DOI：10.3987/com-08-s(d)74

  日期：——

  1-Hydroxy sugars were dehydratively coupled with a variety of alcohols including thiophenol in the presence of a catalytic amount of ytterbium(III) triflate [Yb(OTf) 3 ] and methoxyacetic acid to give the corresponding glycosides in good to excellent yields, and in some cases, with high stereoselectivities. The reaction proceeds through selective esterification of 1-hydroxy sugars with methoxyacetic

  在催化量的三氟甲磺酸镱 (III) [Yb(OTf) 3 ] 和甲氧基乙酸的存在下，将 1-羟基糖与包括苯硫酚在内的多种醇脱水偶联，得到相应的糖苷，收率良好至极好，并且在在某些情况下，具有高立体选择性。在作为糖基受体的游离醇存在下，该反应通过 1-羟基糖与甲氧基乙酸的选择性酯化进行。讨论了甲氧基乙酸介导的Yb(OTf) 3 串联催化的机理。
• An Efficient Glycosylation Reaction of 1-Hydroxy Sugars with Various Nucleophiles Using A Catalytic Amount of Activator and Hexamethyldisiloxane
  作者：Teruaki Mukaiyama、Koki Matsubara、Miyuki Hora

  DOI：10.1055/s-1994-25695

  日期：——

  In the presence of hexamethyldisiloxane and anhydrous calcium sulfate, a catalytic amount of activator such as tin(II) trifluoromethanesulfonate, ytterbium trifluoromethanesulfonate , lanthanum trifluoromethanesulfonate or tin(II) chloride smoothly promotes the glycosylation reactions between 1-hydroxy sugars and free alcohols, electron-rich aromatic compounds or silylated nucleophiles to produce various O -, C - or N - glycosides stereoselectively in high yields. In the case of oxygen or nitrogen nucleophiles, β-ribosides are formed, except that α-ribosides are obtained predominantly in the presence of lithium perchlorate. In the case of carbon nucleophiles such as electron-rich aromatic compounds or silyl enol ethers derived from carbonyl compounds, perfect β-selectivity is shown either in the the presence or absence of lithium perchlorate. Further, pyranosyl substrates such as glucose or galactose afford the corresponding α-anomers, except with electron-rich aromatic compounds.

  在六甲基二硅氧烷和无水硫酸钙的存在下，以催化量的活化剂（如二氟三氟甲磺酸锡、三氟三氟甲磺酸镱、三氟三氟甲磺酸镧或二氯化锡）顺利促进1-羟基糖与自由醇、富电子芳香化合物或硅化亲核试剂之间的糖基化反应，高产率地选择性合成各种O-、C-或N-糖苷。对于氧或氮亲核试剂，主要生成β-核糖苷，但在高氯酸锂存在下主要得到α-核糖苷。对于碳亲核试剂（如富电子芳香化合物或来自羰基化合物的硅基烯醇醚），无论在高氯酸锂存在或不存在下，均表现出完全的β-选择性。此外，吡喃糖基底物（如葡萄糖或半乳糖）主要生成相应的α-异构体，但对于富电子芳香化合物则例外。
• Stereoselective Syntheses of<i>α</i>-D- and<i>β</i>-D-Ribofuranosides Catalyzed by the Combined Use of Silver Salts and Their Partners
  作者：Naoyuki Shimomura、Teruaki Mukaiyama

  DOI：10.1246/bcsj.67.2532

  日期：1994.9

  α-d-Ribofuranosides are stereoselectively synthesized in high yields from 2,3,5-tri-O-benzyl-1-O-iodoacetyl-d-ribofuranose (1) and trimethylsilylated nucleophiles by the use of silver salts in the coexistence of 3 molar amounts of lithium perchlorate, while β-d-ribofuranosides are prepared predominantly in high yields by the reaction of 1 and trimethylsilylated nucleophiles or 2,3,5-tri-O-benzyl-d-ribofuranose and free alcohols by using [diphenyltin sulfide/silver salt] or [Lawesson’s reagent/silver salt] combined catalyst system.

  α-d-核呋喃糖苷是由 2,3,5-三-O-苄基-1-O-碘乙酰-d-核呋喃糖（1）和三甲基硅烷基化的亲核物通过使用银盐与 3 摩尔量的高氯酸锂共存进行立体选择性高产率合成的、而使用[二苯基硫化锡/银盐]或[Lawesson 试剂/银盐]组合催化剂体系，通过 1 和三甲基硅烷化亲核物或 2,3,5-三-O-苄基-d-呋喃三糖与游离醇的反应，主要可以高产率制备出 β-d-呋喃核苷。
• STEREOSELECTIVE SYNTHESIS OF 1,2-<i>CIS</i>-GLYCOFURANOSIDES USING GLYCOFURANOSYL FLUORIDES
  作者：Teruaki Mukaiyama、Yukihiko Hashimoto、Shin-ichiro Shoda

  DOI：10.1246/cl.1983.935

  日期：1983.6.5

  1,2-cis-Ribofuranosides are stereoselectively synthesized in high yields by the reaction of β-ribofuranosyl fluoride and alcohols in the presence of stannous chloride and trityl perchlorate. Under similar condition, α-arabinofuranosyl fluoride reacts with cholestanol to give 1,2-cis-arabinofuranoside predominatly.

  在氯化亚锡和高氯酸三苯甲基酯的存在下，通过 β-呋喃核糖基氟和醇的反应，以高产率立体选择性地合成 1,2-顺式-呋喃核糖苷。在类似条件下，α-阿拉伯呋喃糖基氟与胆甾醇反应主要生成1,2-顺式-阿拉伯呋喃糖苷。
• MUKAIYAMA, TERUAKI;SHIMPUKU, TETSURO;TAKASHIMA, TOHRU;KOBAYASHI, SH(-), CHEM. LETT.,(1989) N, C. 145-148
  作者：MUKAIYAMA, TERUAKI、SHIMPUKU, TETSURO、TAKASHIMA, TOHRU、KOBAYASHI, SH(-)

  DOI：——

  日期：——