3-O-benzoyl-4,6-benzylidene β-methyl-D-mannopyranoside | 163180-51-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃二恶英
• 英文名称: 3-O-benzoyl-4,6-benzylidene β-methyl-D-mannopyranoside
• 英文别名: [(2R,4aR,6R,7S,8R,8aR)-7-hydroxy-6-methoxy-2-phenyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-8-yl] benzoate
• CAS: 163180-51-6
• 化学式: C₂₁H₂₂O₇
• 分子量: 386.401
• InChiKey: KOUFUTRDALSUPO-MRTPNAOKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  28
• 可旋转键数：
  5
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  83.4
• 氢给体数：
  1
• 氢受体数：
  7

反应信息

• 作为产物：
  描述：

  methyl 3-O-benzoyl-4, 6-O-benzylidene-α-D-mannopyranoside 在 N-溴代丁二酰亚胺(NBS) 、 偶氮二异丁腈 、 三正丁基氢锡 、 silica gel 作用下， 反应 5.0h， 生成 3-O-benzoyl-4,6-benzylidene β-methyl-D-mannopyranoside
  参考文献：
  名称：

  Intramolecular hydrogen atom abstraction in carbohydrates and nucleosides: Inversion of an α- to β-mannopyranoside and generation of thymidine C-4′ radicals

  摘要：

  Treatment of 1-bromo-2-methyl-2-propyl ether derivatives of alcohols with Bu(3)SnH(D) results in 1,5-Hydrogen abstraction reactions: the system is applied to the inversion of an alpha- to beta-mannoside and to the formation of nucleoside C4' radicals.

  DOI：

  10.1016/s0040-4039(00)73450-2

文献信息

• Regioselective Benzoylation of 6-O-Protected and 4,6-O-Diprotected Hexopyranosides as Promoted by Chiral and Achiral Ditertiary 1,2-Diamines
  作者：Guixian Hu、Andrea Vasella

  DOI：10.1002/hlca.200290018

  日期：2002.12

  Monobenzoylation of triols (6-O-silylated glycopyranosides) or diols (4,6-O-benzylidenated glycopyranosides) with benzoyl chloride and triethylamine at −60° to 23° is promoted by catalytic amounts of ditertiary 1,2-diamines. The regioselectivity depends mostly on the structure of the alcohols; it is modulated by the configuration and constitution of the diamines, as shown by comparing the effect of Oriyama's

  三醇（6- Monobenzoylation ö -silylated glycopyranosides）或二醇（4,6- ö在-60℃至23 -benzylidenated glycopyranosides）与苯甲酰氯和三乙胺°通过催化量的二叔1,2-二胺的促进。区域选择性主要取决于醇的结构。通过比较Oriyama催化剂（（S）-1和（R）-1），N，N，N ′，N′-四甲基乙二胺（TMEDA ）的作用可以看出，它受二胺的构型和组成的调节。），N，N，N'，N'-四乙基乙二胺（TEEDA），Et 3 N和EtNMe 2。催化剂的空间位阻会削弱其对反应性的影响。与在Oriyama催化剂存在下外消旋-环己烷-1,2-二醇的单和二苯甲酰基化的适度对映选择性相一致，这些二胺对区域选择性的影响相当有限。尽管与过程简单相关，但是在某些情况下，这些催化剂比单一方法可产生更高的单种苯甲酸酯收率。在制备3-
• Control of the ambident reactivity of the nitrite ion
  作者：Hai Dong、Martin Rahm、Niranjan Thota、Lingquan Deng、Tore Brinck、Olof Ramström

  DOI：10.1039/c2ob26980e

  日期：——

  triflate inversion, whereas with neighbouring benzyl ether groups or axial ester groups, mixtures are generally produced. In the present study, the origin of this difference was addressed. The ambident reactivity of the nitrite ion has been found to be the cause of the complex product formation observed, which can be controlled by a neighbouring equatorial ester group. Both N-attack and O-attack occur

  在以前的研究中，据报道，相邻的赤道酯基对于亚硝酸盐介导的三氟甲磺酸盐转化的良好收率是必不可少的，而对于相邻的苄基醚基或轴向酯基，通常会产生混合物。在本研究中，解决了这种差异的根源。已发现亚硝酸根离子的环境反应性是观察到形成复杂产物的原因，其可以由相邻的赤道酯基团控制。N-攻击和O-攻击都在不存在酯基的情况下发生，而O-攻击在存在酯基的情况下是有利的。除了空间效应外，还基于邻近酯基团与传入亲核试剂之间的次要相互作用，提出了一种邻近基团辅助机制。为了描述这种影响，进行了高级量子力学计算。理论结果与实验非常吻合，并暗示了对邻近的赤道酯基的催化作用。
• Stereospecific Ester Activation in Nitrite-Mediated Carbohydrate Epimerization
  作者：Hai Dong、Zhichao Pei、Olof Ramström

  DOI：10.1021/jo052662i

  日期：2006.4.1

  essential for the reactivity of the nitrite-mediated triflate inversion. Furthermore, a good inversion yield also depended on the relative configuration of the neighboring ester group to the triflate. Only with the ester group in the equatorial position, whatever the configuration of the triflate, did the reaction proceed smoothly, whereas a neighboring axial ester group proved largely inefficient. The

  亚硝酸盐介导的碳水化合物三氟甲磺酸酯取代的Lattrell-Dax方法是一种有效的方法，可生成逆构型的结构。在本研究中，已经研究了通过三氟甲磺酸酯/亚硝酸盐处理将葡萄糖和吡喃半乳糖苷衍生物差向异构化为相应的异吡喃和吡喃吡喃糖结构。已经发现，相邻的酯基对于亚硝酸盐介导的三氟甲磺酸盐转化的反应性是必不可少的。此外，良好的转化产率还取决于相邻酯基与三氟甲磺酸酯的相对构型。无论三氟甲磺酸酯的构型如何，只有在酯基处于赤道位置时，反应才能顺利进行，而相邻的轴向酯基却被证明效率低下。
• Intramolecular hydrogen atom abstraction in carbohydrates and nucleosides: Inversion of an α- to β-mannopyranoside and generation of thymidine C-4′ radicals
  作者：Jarmila Brunckova、David Crich、Qingwei Yao

  DOI：10.1016/s0040-4039(00)73450-2

  日期：1994.9

  Treatment of 1-bromo-2-methyl-2-propyl ether derivatives of alcohols with Bu(3)SnH(D) results in 1,5-Hydrogen abstraction reactions: the system is applied to the inversion of an alpha- to beta-mannoside and to the formation of nucleoside C4' radicals.