6-O-acetyl-2,3,4-tri-O-benzyl-α-D-glucopyranosyl bromide | 35094-58-7

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 6-O-acetyl-2,3,4-tri-O-benzyl-α-D-glucopyranosyl bromide
• 英文别名: [(2R,3R,4S,5R,6R)-6-bromo-3,4,5-tris(phenylmethoxy)oxan-2-yl]methyl acetate
• CAS: 35094-58-7
• 化学式: C₂₉H₃₁BrO₆
• 分子量: 555.466
• InChiKey: SRPTUXBZBUQZDC-RQKPWJHBSA-N

物化性质

• 沸点：
  615.1±55.0 °C(Predicted)
• 密度：
  1.34±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  5
• 重原子数：
  36
• 可旋转键数：
  12
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.34
• 拓扑面积：
  63.2
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  6-O-acetyl-2,3,4-tri-O-benzyl-α-D-glucopyranosyl bromide 生成 (3R,4S,5R,6R)-3,4,5-Tris-benzyloxy-6-[(2S,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-((2S,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-hydroxymethyl-tetrahydro-pyran-2-yloxymethyl)-tetrahydro-pyran-2-yloxymethyl]-tetrahydro-pyran-2-ol
  参考文献：
  名称：

  Use of low molecular weight polyethylene glycol linker for polymer-supported solution synthesis of oligosaccharides

  摘要：

  两种新型低分子量聚乙二醇连接剂，用于寡糖的溶液合成。

  DOI：

  10.1039/cc9960002193
• 作为产物：
  描述：

  甲基 2,3,4,6-O-四苄基-alpha-D-吡喃葡萄糖苷 在 硫酸 、 氢溴酸 、 溶剂黄146 作用下， 以 1,2-二氯乙烷 为溶剂， 反应 1.17h， 生成 6-O-acetyl-2,3,4-tri-O-benzyl-α-D-glucopyranosyl bromide
  参考文献：
  名称：

  Synthesis of Septanosides through an Oxyglycal Route

  摘要：

  A new route to synthesize septanoside derivatives from protected 2-hydroxyglycals is reported. Ring expansion of a pyranoside to a septanoside was achieved through key reactions of a cyclopropanation, ring opening, oxidation, and reduction. Methyl septanoside derivatives, namely, methyl alpha-D-glycero-D-talo-septanoside and methyl alpha-D-glycero-L-altro-septanoside, were synthesized in an overall yield of 35% and 46%, respectively, from the corresponding protected 2-hydroxy glycals.

  DOI：

  10.1021/jo070444e

文献信息

• [EN] HEPARANASE INHIBITORS AND THEIR USE AS ANTI-CANCER COMPOUNDS<br/>[FR] INHIBITEURS D'HÉPARANASE ET LEUR UTILISATION COMME COMPOSÉS ANTICANCÉREUX
  申请人：UNIV WAYNE STATE

  公开号：WO2020118103A1

  公开（公告）日：2020-06-11

  Anti-heparanase compounds for the treatment of cancer are described. The anti-heparanase compounds are high affinity, synthetic glycopolymers that result in minimal anticoagulant activity. Stereoselective fluorinated forms of these compounds are also provided.

  描述了用于治疗癌症的抗肝素酶化合物。这些抗肝素酶化合物是高亲和力的合成糖聚合物，导致最小的抗凝活性。此外还提供了这些化合物的立体选择性氟化形式。
• A “Traceless” Directing Group Enables Catalytic S_<i>N</i>2 Glycosylation toward 1,2-<i>cis</i>-Glycopyranosides
  作者：Xu Ma、Zhitong Zheng、Yue Fu、Xijun Zhu、Peng Liu、Liming Zhang

  DOI：10.1021/jacs.1c04584

  日期：2021.8.11

  Generally applicable and stereoselective formation of 1,2-cis-glycopyranosidic linkage remains a long sought after yet unmet goal in carbohydrate chemistry. This work advances a strategy to this challenge via stereoinversion at the anomeric position of 1,2-trans glycosyl ester donors. This SN2 glycosylation is enabled under gold catalysis by an oxazole-based directing group optimally tethered to a

  1,2-顺式-吡喃糖苷键的普遍适用和立体选择性形成仍然是碳水化合物化学中长期追求但尚未实现的目标。这项工作通过在 1,2-反式糖基酯供体的异头位置上的立体倒置推进了应对这一挑战的策略。这种 S N 2 糖基化是在金催化下通过以恶唑为基础的导向基团实现的，该导向基团最佳地束缚在离去基团上，并在温和的催化条件下以大多数优异的产率和良好的选择性实现。该策略也适用于寡糖的合成。
• HEPARANASE INHIBITORS FOR TREATMENT OF DIABETES
  申请人：Wayne State University

  公开号：US20210205350A1

  公开（公告）日：2021-07-08

  Anti-heparanase compounds for the treatment of diabetes are described. The anti-heparanase compounds are high affinity, synthetic glycopolymers that result in minimal anticoagulant activity. Stereoselective fluorinated forms of these compounds are also provided.

  描述了用于治疗糖尿病的抗肝素酶化合物。这些抗肝素酶化合物是高亲和力的合成糖聚合物，几乎不具有抗凝血活性。此外，还提供了这些化合物的立体选择性氟化形式。
• An easy access to halide ion-catalytic α-glycosylation using carbon tetrabromide and triphenylphosphine as multifunctional reagents
  作者：Yuko Shingu、Yoshihiro Nishida、Hirofumi Dohi、Kazukiyo Kobayashi

  DOI：10.1039/b303984f

  日期：——

  The reaction of a 2-O-benzyl-1-hydroxy sugar with CBr4 and Ph3P generates a glycosyl bromide in situ, which is coupled with an acceptor alcohol in the presence of N,N-tetramethylurea to afford an α-glycosyl product virtually quantitatively. In a proposed pathway, the reagent combination plays multiple roles such as the generation of a glycosyl donor, the activation of glycosylation, and the dehydration of the reaction system. These roles allow a simple α-glycosylation to be performed without special attention to dehydration. Various α-glycosyl (D-gluco-, D-galacto- and L-fuco-) products including glycosyl glycerols and cholesterols have been prepared with this method.

  2-O-苄基-1-羟基糖与CBr4和Ph3P反应生成一种即时的糖基溴化物，该溴化物在N,N-四甲基脲存在下与受体醇耦合，几乎定量地得到α-糖基产物。在提出的反应途径中，试剂组合扮演了多个角色，如糖基供体的生成、糖基化的活化以及反应体系的脱水作用。这些角色使得一个简单的α-糖基化反应得以进行，而无需特别关注脱水步骤。利用这种方法已经制备了多种α-糖基（D-葡萄糖、D-半乳糖和L-岩藻糖）产物，包括糖基甘油和胆固醇。
• Diastereoselective sp³ C–O Bond Formation via Visible Light-Induced, Copper-Catalyzed Cross-Couplings of Glycosyl Bromides with Aliphatic Alcohols
  作者：Fei Yu、Jalen L. Dickson、Ravi S. Loka、Hengfu Xu、Richard N. Schaugaard、H. Bernhard Schlegel、Long Luo、Hien M. Nguyen

  DOI：10.1021/acscatal.0c01470

  日期：2020.6.5

  electrophiles to control α-1,2-cis selectivity. In our approach, earth-abundant copper not only acts as a photocatalyst and a bond-forming catalyst, but also enforces the stereocontrolled formation of anomeric C–O bonds. This cross-coupling protocol enables highly diastereoselective access to a wide variety of α-1,2-cis-glycosides and biologically relevant α-glycan oligosaccharides. Our work provides a foundation

  铜催化的交叉偶联反应已成为产生碳-杂原子键（许多有机分子的重要框架）的最有效方法之一。但是，由于铜的氧化加成反应迟钝，铜催化的卤代烷与烷基醇的C（sp 3）–O交叉偶联仍然难以实现。为解决这一挑战，我们开发了一种催化铜系统，该系统可借助可见光克服铜的氧化加成障碍，并有效地促进糖基溴化物与脂肪族醇的交叉偶联，从而提供具有C（sp 3）-O键的高非对映选择性。重要的是，该催化体系导致温和而有效的立体选择性构建α-1,2-顺式的方法苷，这是最重要的，但具有挑战性。通常，α-1,2-顺式糖苷C–O键形成过程中的立体化学结果是无法预测的，并且取决于与碳水化合物偶联伙伴结合的保护基的空间和电子性质。当前，最可靠的方法依赖于在碳水化合物亲电体的C2和C4位置使用手性辅助或氢键引导基团来控制α-1,2-顺式选择性。在我们的方法中，富含地球的铜不仅充当光催化剂和形成键的催化剂，而且还增强了异头C-O键的立体