methyl 2,3-di-O-benzyl-6-O-benzoyl-α-D-galactopyranoside | 125884-36-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 2,3-di-O-benzyl-6-O-benzoyl-α-D-galactopyranoside
• 英文别名: methyl 6-O-benzoyl-2,3-di-O-benzyl-α-D-galactopyranoside；methyl-2,3-di-O-benzyl-6-O-benzoyl-α-D-galactopyranoside；[(2R,3S,4S,5R,6S)-3-hydroxy-6-methoxy-4,5-bis(phenylmethoxy)oxan-2-yl]methyl benzoate
• CAS: 125884-36-8
• 化学式: C₂₈H₃₀O₇
• 分子量: 478.542
• InChiKey: GAFQPRARNIDGOF-YTZVEHKTSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.7
• 重原子数：
  35
• 可旋转键数：
  11
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.32
• 拓扑面积：
  83.4
• 氢给体数：
  1
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  methyl 2,3-di-O-benzyl-6-O-benzoyl-α-D-galactopyranoside 在 吡啶 、 sodium dihydrogenphosphate 、 sodium amalgam 、 lithium aluminium tetrahydride 、 正丁基锂 、 四丁基溴化铵 、 sodium hydride 、 三乙胺 作用下， 以 四氢呋喃 、 甲醇 、 乙醚 、 二氯甲烷 为溶剂， 反应 41.5h， 生成 methyl 2,3-di-O-benzyl-4-S-vinyl-4-thio-α-D-glucopyranoside
  参考文献：
  名称：

  Vinyl bis-sulfone methodology in thiosugars: selective access to chiral thiovinyl sulfones and PSE oxathianes

  摘要：

  Based on the vinyl biS-sulfone methodology previously developed to synthesize PSE acetals, an original approach to homochiral carbohydrate-derived PSE 1,3-oxathianes is described. The ready formation of intermediate phenylsul fonyl vinyl sulfides, which have a synthetic potential of their own, emphasizes the versatility of the method. (c) 2006 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2006.03.023
• 作为产物：
  描述：

  Α-D-乳酸吡喃糖苷甲酯 在 水 、 苯酸四丁基铵 、 sodium hydride 、 对甲苯磺酸 、 溶剂黄146 作用下， 以 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 生成 methyl 2,3-di-O-benzyl-6-O-benzoyl-α-D-galactopyranoside
  参考文献：
  名称：

  A green and convenient method for regioselective mono and multiple benzoylation of diols and polyols

  摘要：

  An efficient method for regioselective benzoylation of diols and polyols was developed. The benzoylation is catalyzed by only 0.2 equiv of benzoate anion in acetonitrile with the addition of a stoichiometric amount of benzoic anhydride under very mild condition, leading to high yields. Compared with all other methods, this method shows particular advantage in regioselective multiple benzoylation of polyols, and in avoiding the use of any metal-based catalysts and any amine bases, which is more environment friendly. (C) 2015 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2015.12.074

文献信息

• Regioselective Benzoylation of Diols and Carbohydrates by Catalytic Amounts of Organobase
  作者：Yuchao Lu、Chenxi Hou、Jingli Ren、Xiaoting Xin、Hengfu Xu、Yuxin Pei、Hai Dong、Zhichao Pei

  DOI：10.3390/molecules21050641

  日期：——

  A novel metal-free organobase-catalyzed regioselective benzoylation of diols and carbohydrates has been developed. Treatment of diol and carbohydrate substrates with 1.1 equiv. of 1-benzoylimidazole and 0.2 equiv. of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in MeCN under mild conditions resulted in highly regioselective benzoylation for the primary hydroxyl group. Importantly, compared to most commonly

  已经开发出一种新型的无金属有机碱催化的二醇和碳水化合物的区域选择性苯甲酰化。用 1.1 当量处理二醇和碳水化合物底物。1-苯甲酰咪唑和 0.2 当量。1,8-二氮杂双环[5.4.0] undec-7-ene (DBU) 在温和条件下在 MeCN 中的反应导致伯羟基的高度区域选择性苯甲酰化。重要的是，与最常用的伯羟基保护基团相比，苯甲酰基保护基团提供了一种新的保护策略。
• N-Trichloroethoxycarbonyl-glucosamine derivatives as glycosyl donors
  作者：Wulf Dullenkopf、Julio C. Castro-Palomino、Leonardo Manzoni、Richard R. Schmidt

  DOI：10.1016/s0008-6215(96)00237-6

  日期：1996.12

  -D-glucopyranosyl trichloroacetimidate (6). Reaction of 5 with five selectively protected glycosides as glycosyl acceptors in the presence of N-iodosuccinimide/trifluoromethanesulfonic acid as the promoter system furnished the corresponding beta-glycosides in good yields, thus exhibiting the valuable glycosyl donor properties of 5. Reductive removal of the trichloroethoxycarbonyl (Teoc) group afforded the corresponding

  D-葡萄糖胺可以容易地转化为1,3,4,6-四-O-乙酰基-2-脱氧-2-（2,2,2-三氯乙氧基羰基氨基++）-D-吡喃葡萄糖（2）。从该中间体可以得到有价值的糖基供体。在三氟化硼醚化物存在下与乙硫醇反应得到乙基3,4,6-三-O-乙酰基-2-脱氧-1-硫-2-（2,2,2-三氯乙氧基羰基氨基）-β-D-吡喃葡萄糖苷（ 4），经N-乙酰化得到N-乙酰基-N-三氯乙氧基羰基衍生物（5）。在2中选择性除去1-O-乙酰基，然后在碱存在下用三氯乙腈处理，得到3,4,6-三-O-乙酰基-2-脱氧-2-（2,2,2-三氯乙氧基羰基氨基） -α-D-吡喃葡萄糖基三氯乙酰亚胺酸酯（6）。在N-碘代琥珀酰亚胺/三氟甲磺酸作为促进剂体系存在下，5与5个被选择性保护的糖苷作为糖基受体的反应以良好的产率提供了相应的β-糖苷，因此显示出5的有价值的糖基供体性质。 （Teoc）基团以高收率提供了相应的N-乙酰基保护
• Regioselective Sulfonylation/Acylation of Carbohydrates Catalyzed by FeCl₃ Combined with Benzoyltrifluoroacetone and Its Mechanism Study
  作者：Jian Lv、Jia-Jia Zhu、Yu Liu、Hai Dong

  DOI：10.1021/acs.joc.9b03128

  日期：2020.3.6

  A catalytic amount of FeCl3 combined with benzoyl trifluoroacetone (Hbtfa) (FeCl3/Hbtfa = 1/2) was used to catalyze sulfonylation/acylation of diols and polyols using diisopropylethylamine (DIPEA) or potassium carbonate (K2CO3) as a base. The catalytic system exhibited high catalytic activity, leading to excellent isolated yields of sulfonylation/acylation products with high regioselectivities. Mechanism

  使用二异丙基乙胺（DIPEA）或碳酸钾（K2CO3）作为碱，将催化量的FeCl3与苯甲酰基三氟丙酮（Hbtfa）（FeCl3 / Hbtfa = 1/2）结合用于催化二醇和多元醇的磺酰化/酰化。该催化体系表现出高催化活性，导致具有高区域选择性的磺酰化/酰化产物的优异分离产率。机理研究表明，FeCl3最初在碱性条件下于室温下于溶剂乙腈中以两倍的Hbtfa量形成[Fe（btfa）3]（btfa =苯甲酰基三氟丙酮酸酯）。然后，在碱的存在下，Fe（btfa）3和底物的两个羟基形成五元或六元环中间体。环状中间体和磺酰化试剂之间的随后反应导致底物的选择性磺酰化。所有关键中间体均在高分辨率质谱分析中捕获，因此首次证明了这种机理。
• Acylation of carbohydrates over Al2O3: preparation of partially and fully acylated carbohydrate derivatives and acetylated glycosyl chlorides
  作者：Pallavi Tiwari、Anup Kumar Misra

  DOI：10.1016/j.carres.2005.11.035

  日期：2006.2

  protocol does not require the addition of any base or activator. This methodology has been further extended to the selective acylation of carbohydrate diols and the one-pot preparation of acetylated glycosyl chlorides direct from free reducing sugars. The yields obtained in most of the cases are excellent.

  据报道，使用酰氯和固体支持剂Al2O3对碳水化合物衍生物进行选择性和全O酰化。该协议不需要添加任何碱或活化剂。该方法已经进一步扩展到碳水化合物二醇的选择性酰化和直接从游离还原糖直接制备一锅乙酰化糖基氯的方法。在大多数情况下所获得的产量是极好的。
• Synthesis of building blocks for an iterative approach towards oligomers of the <i>Streptococcus pneumoniae</i> type 1 zwitterionic capsular polysaccharide repeating unit
  作者：Aisling Ní Cheallaigh、Stefan Oscarson

  DOI：10.1139/cjc-2016-0006

  日期：2016.11

  extendable trisaccharide building blocks of the zwitterionic capsular polysaccharides of Spt1 is described. Key elements include the comparison of pre-glycosylation oxidation and post-glycosylation oxidation approaches using thioglycoside donors to the target trisaccharide, the optimisation of the post-glycosylation oxidation approach, and the conversion of the trisaccharide to building blocks tailored

  来自 1 型肺炎链球菌 (Spt1) 的两性离子荚膜多糖提取物，质量约为 8 kDa，已显示出独特的 T 细胞激活特性。Spt1荚膜多糖的三糖重复单元的低聚物[→3)-4-NH2-α-d-QuipNAc-(1→4)-α-d-GalpA-(1→3)-α-d-GalpA- (1-]n 需要定义长度来进一步研究这种反应。描述了一种实现 Spt1 的两性离子荚膜多糖的可迭代扩展的三糖构建块的方法。关键要素包括糖基化前氧化和糖基化后氧化方法的比较使用硫糖苷供体到目标三糖，优化后糖基化氧化方法，以及将三糖转化为为迭代糖基化量身定制的构建块。