methyl 2-deoxy-6-O-TBDMS-α-D-glucopyranoside | 122795-03-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 2-deoxy-6-O-TBDMS-α-D-glucopyranoside
• 英文别名: (2R,3S,4R,6S)-2-[[tert-butyl(dimethyl)silyl]oxymethyl]-6-methoxyoxane-3,4-diol
• CAS: 122795-03-3
• 化学式: C₁₃H₂₈O₅Si
• 分子量: 292.448
• InChiKey: YWOYDCOQTNQJRL-WYUUTHIRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.49
• 重原子数：
  19
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  68.2
• 氢给体数：
  2
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  methyl 2-deoxy-6-O-TBDMS-α-D-glucopyranoside 在 sodium hydride 作用下， 以 六甲基磷酰三胺 为溶剂， 反应 8.0h， 以90%的产率得到methyl 2-deoxy-α-D-glucopyranoside
  参考文献：
  名称：

  氢化钠对丁基丁基二甲基甲硅烷基醚的还原裂解

  摘要：

  -将丁基二甲基甲硅烷基醚在六甲基磷酸三酰胺（HMPA）或N，N'-二甲基丙烯脲（DMPU）中用氢化钠裂解。

  DOI：

  10.1016/s0040-4039(00)82294-7
• 作为产物：
  描述：

  叔丁基二甲基氯硅烷 、 methyl 2-deoxy-α-D-glucopyranoside 在 咪唑 、 4-二甲氨基吡啶 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 28.0h， 以60%的产率得到methyl 2-deoxy-6-O-TBDMS-α-D-glucopyranoside
  参考文献：
  名称：

  Carbohydrate Phosphinites as Practical Ligands in Asymmetric Catalysis:  Electronic Effects and Dependence of Backbone Chirality in Rh-Catalyzed Asymmetric Hydrogenations. Synthesis of R- or S-Amino Acids Using Natural Sugars as Ligand Precursors

  摘要：

  Vicinal diarylphosphinites derived from carbohydrates are excellent ligands for the Rh(I)-catalyzed enantioselective asymmetric hydrogenation of dehydroamino acid derivatives, producing the highest enantioselectivity of any ligands directly prepared from natural products. The enantioselectivity can be enhanced by the appropriate choice of substituents on the aromatic rings of the phosphinites. For example, the use of phosphinites with electron-donating bis(3,5-dimethylphenyl) groups on phosphorus provides ee's up to 99% for a wide range of amino acids including some with easily removable N-protecting groups. Electron-withdrawing aryl substituents, on the other hand, decrease the enantioselectivity. Sense of chiral induction in the amino acid product depends on the relative juxtaposition of the vicinal diphosphinites on a given sugar backbone. When readily available D-glucopyranosides are used as the starting sugars, 2,3-phosphinites give the S-amino acids and 3,4-phosphinites give the R-amino acids. In the case of aromatic and heteroaromatic amino acids, enantioselectivities > 95% are consistently obtained. Practical considerations such as the ease of ligand synthesis, rates of reactions, catalyst turnover, and scope and limitations in terms of substrates are discussed. A possible explanation for the enhancement of enantioselectivity by electron-rich phosphinites is offered.

  DOI：

  10.1021/jo970884d

文献信息

• Organotin-catalyzed regioselective benzylation of carbohydrate trans-diols
  作者：Hengfu Xu、Ying Zhang、Hai Dong、Yuchao Lu、Yuxin Pei、Zhichao Pei

  DOI：10.1016/j.tetlet.2017.08.043

  日期：2017.10

  approach to regioselective benzylation of carbohydrate trans-diols was developed, where 0.1 equiv. of Bu2SnCl2 and 0.1 equiv. of TBABr were used as the catalysts and 2.0 equiv. of BnCl was used as the benzylation reagent. In most cases, similar or better benzylation regioselectivities and isolated yields were obtained by using catalytic amounts of Bu2SnCl2, rather than stoichiometric amounts of organotin

  开发了一种方便的方法，用于碳水化合物反式二醇的区域选择性苄化，其中0.1当量。的Bu 2 SnCl 2和0.1当量 使用TBABr 2的催化剂作为催化剂，当量为2.0当量。将BnCl 2用作苄基化试剂。在大多数情况下，通过使用催化量的Bu 2 SnCl 2而不是所需化学计量的有机锡试剂，可获得相似或更好的苄基化区域选择性和分离的产率。
• Reductive cleavage of t-butyldimethylsilyl ethers with sodium hydride
  作者：Mohammed Salehpp Shekhani、Khalid Mohammed Khan、Khalid Mahmood

  DOI：10.1016/s0040-4039(00)82294-7

  日期：——

  -Butyldimethylsilyl ethers are cleaved with sodium hydride in hexamethylphosphoric triamide (HMPA) or N,N′-dimethylpropyleneurea (DMPU).

  -将丁基二甲基甲硅烷基醚在六甲基磷酸三酰胺（HMPA）或N，N'-二甲基丙烯脲（DMPU）中用氢化钠裂解。
• Carbohydrate Phosphinites as Practical Ligands in Asymmetric Catalysis:  Electronic Effects and Dependence of Backbone Chirality in Rh-Catalyzed Asymmetric Hydrogenations. Synthesis of <i>R</i>- or <i>S</i>-Amino Acids Using Natural Sugars as Ligand Precursors
  作者：T. V. RajanBabu、Timothy A. Ayers、Gary A. Halliday、Kimberly K. You、Joseph C. Calabrese

  DOI：10.1021/jo970884d

  日期：1997.8.1

  Vicinal diarylphosphinites derived from carbohydrates are excellent ligands for the Rh(I)-catalyzed enantioselective asymmetric hydrogenation of dehydroamino acid derivatives, producing the highest enantioselectivity of any ligands directly prepared from natural products. The enantioselectivity can be enhanced by the appropriate choice of substituents on the aromatic rings of the phosphinites. For example, the use of phosphinites with electron-donating bis(3,5-dimethylphenyl) groups on phosphorus provides ee's up to 99% for a wide range of amino acids including some with easily removable N-protecting groups. Electron-withdrawing aryl substituents, on the other hand, decrease the enantioselectivity. Sense of chiral induction in the amino acid product depends on the relative juxtaposition of the vicinal diphosphinites on a given sugar backbone. When readily available D-glucopyranosides are used as the starting sugars, 2,3-phosphinites give the S-amino acids and 3,4-phosphinites give the R-amino acids. In the case of aromatic and heteroaromatic amino acids, enantioselectivities > 95% are consistently obtained. Practical considerations such as the ease of ligand synthesis, rates of reactions, catalyst turnover, and scope and limitations in terms of substrates are discussed. A possible explanation for the enhancement of enantioselectivity by electron-rich phosphinites is offered.