methyl 3-O-benzyl-α-D-mannopyranoside | 93714-01-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 3-O-benzyl-α-D-mannopyranoside
• 英文别名: methyl 3-O-benzyl-α-D-manopyranoside；(2R,3R,4S,5S,6S)-2-(hydroxymethyl)-6-methoxy-4-phenylmethoxyoxane-3,5-diol
• CAS: 93714-01-3
• 化学式: C₁₄H₂₀O₆
• 分子量: 284.309
• InChiKey: MXGLQICHRQGRDX-DGTMBMJNSA-N

物化性质

• 沸点：
  484.2±45.0 °C(Predicted)
• 密度：
  1.31±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  -0.2
• 重原子数：
  20
• 可旋转键数：
  5
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  88.4
• 氢给体数：
  3
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  methyl 3-O-benzyl-α-D-mannopyranoside 在 4 A molecular sieve 、 硫酸 、 二正丁基氧化锡 、 cesium fluoride 作用下， 以 溶剂黄146 为溶剂， 反应 25.0h， 生成 methyl 3-O-benzyl-β-D-mannopyranosyl-(1-4)-2,3,6-tri-O-benzoyl-α-D-glucopyranoside
  参考文献：
  名称：

  Glycosylation via locked anomeric configuration: stereospecific synthesis of oligosaccharides containing the β-d-mannopyranosyl and β-l-rhamnopyranosyl linkage11For a preliminary account of this work, see ref. [7].

  摘要：

  cis-1,2-Stannylene acetals of D-mannose and L-rhamnose, formed preferentially from the free sugars treated with dibutyltin oxide, are capable of displacing the trifluoromethanesulfonyl (triflyl) leaving groups in carbohydrates to give, with retention of configuration at the anomeric center in the nucleophile, cis-1,2-linked oligosaccharides. In the case of secondary triflates, the new glycosidic linkage is formed with complete inversion of configuration in the electrophile. Both the reactivity of the electrophile and nucleophilicity of oxygens in the stannylene complex affect the overall outcome of the reaction. From the comparison of results of a number of glycosylations via stannylene acetals, it appears that nucleophilicity of oxygens involved in the cis-1,2-acetals decreases in the order: equatorial anomeric > equatorial non-anomeric > axial anomeric. Consequently, treatment of the stannylene acetal prepared from D-mannose (mainly the cis-1,2-stannylene compound in admixture with a small proportion of the cis-2,3-stannylene acetal) with methyl 2,3,4-tri-O-benzoyl-6-O-trifluoromethanesulfonyl-alpha-D-glucopyranoside yielded, in addition to the expected beta-D-mannopyranoside (major), a product of non-anomeric alkylation at O-3. On the other hand, glycosylation of the stannylene acetal derived from maltose with methyl 2,3,6-tri-O-benzoyl-4-O-trifluoromethanesulfonyl-alpha-D-galactopyranoside gave almost exclusively a non-glycosidically, (2 --> 4)-linked pseudo-trisaccharide. Combination of the glycosylation via locked anomeric configuration with conventional glycosylations, to yield higher oligosaccharides, is also demonstrated. (C) 1998 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0008-6215(98)00057-3
• 作为产物：
  描述：

  D-甘露糖 在 二正丁基氧化锡 、 乙酰氯 作用下， 以 甲苯 为溶剂， 反应 10.0h， 生成 methyl 3-O-benzyl-α-D-mannopyranoside
  参考文献：
  名称：

  一种2-羟基古洛糖受体衍生物、博来霉素二糖 及其前体的制备方法

  摘要：

  本发明公开了一种2‑羟基古洛糖受体衍生物的制备方法，包括对苄基‑β‑半乳糖苷苄进行叉基保护、3‑位构型翻转、脱乙酰基和选择乙酰化系列反应。同时，本发明还公开了利用所述方法制备得到的2‑羟基古洛糖受体衍生物为受体制备博来霉素二糖及其前体的方法。本发明2‑羟基古洛糖受体衍生物的制备方法解决了天然L‑古洛糖来源稀少，成本太高，不宜工业化等缺陷，同时解决了博来霉素二糖及其前体产率偏低、反应可操作性与重复性差，不宜工业化等不足等难题，具有原料廉价易得、产率高、可操作性强、条件易控、可工业化放大和高效低成本等优点。

  公开号：

  CN108948106B

文献信息

• Regioselective acetylation of carbohydrates and diols catalyzed by tetramethyl-ammonium hydroxide in water
  作者：Yuchao Lu、Peng Wei、Yuxin Pei、Hengfu Xu、Xiaoting Xin、Zhichao Pei

  DOI：10.1039/c4gc00770k

  日期：——

  A novel method for an efficient regioselective acetylation of carbohydrates and diols in aqueous solution is described. Treatment of substrates with 1-acetylimidazole, and tetramethyl-ammonium hydroxide (TMAH) in water under mild conditions gave highly regioselective acetylation for primary hydroxyl groups. This discovery provides an eco-friendly way for selective acetylation of non-protected glycosides

  描述了一种用于在水溶液中有效地对碳水化合物和二醇进行区域选择性乙酰化的新方法。在温和的条件下，在水中用1-乙酰基咪唑和氢氧化四甲基铵（TMAH）处理底物，可得到伯羟基的高度区域选择性乙酰化。该发现为水中非保护的糖苷和二醇的选择性乙酰化提供了一种环保的方法，避免了使用有毒有机溶剂和避免对仲羟基进行预保护的必要性。
• Regioselective Acetylation of Diols and Polyols by Acetate Catalysis: Mechanism and Application
  作者：Bo Ren、Martin Rahm、Xiaoling Zhang、Yixuan Zhou、Hai Dong

  DOI：10.1021/jo501343x

  日期：2014.9.5

  By this method, diols and polyols are regioselectively acetylated in high yields under mild conditions using catalytic amounts of acetate. In comparison to other methods involving reagents such as organotin, organoboron, organosilicon, organobase, and metal salts, this method is more environmentally friendly, convenient, and efficient and is also associated with higher regioselectivity. We have performed

  我们提出了在羟基的酰化中H键活化的原理，其中通过在羟基和阴离子之间形成氢键来活化酰化。在这一原理的指导下，我们证明了一种选择性糖化酰化糖的方法。通过这种方法，在温和的条件下，使用催化量的乙酸盐，可以高收率将二醇和多元醇区域选择性地乙酰化。与其他涉及试剂（例如有机锡，有机硼，有机硅，有机碱和金属盐）的方法相比，该方法对环境更友好，更方便，更高效，并且还具有更高的区域选择性。我们已经进行了彻底的量子化学研究，以破译该机理，这表明乙酸酯首先与二醇形成双H键络合物，这使得随后可以在温和的条件下通过乙酸酐进行单酰化。区域选择性似乎源于二醇和多元醇的固有结构以及它们与配位乙酸酯催化剂的特定相互作用。
• Tin-Mediated Regioselective Benzylation and Allylation of Polyols: Applicability of a Catalytic Approach Under Solvent-Free Conditions
  作者：Maddalena Giordano、Alfonso Iadonisi

  DOI：10.1021/jo402399n

  日期：2014.1.3

  The first catalytic version of the stannylene-mediated benzylation and allylation of polyols is reported. The methodology is based on a simple solvent-free protocol that significantly advances, in terms of both experimental ease and synthetic scope, the applicability of tin-promoted selective protections. The described approach is indeed endowed with a very large number of advantages over routine protocols:

  报道了由亚苯乙烯介导的多元醇的苄基化和烯丙基化的第一个催化形式。该方法基于简单的无溶剂方案，在实验简便性和合成范围方面，都大大提高了锡促进的选择性保护的适用性。与常规方案相比，所描述的方法确实具有许多优点：使用低催化负载量的廉价Bu 2SnO是避免使用溶剂的一步法工艺，是在空气中进行反应的最低要求的实验程序，缩短了反应时间，简化了后处理工艺，目标范围广，在许多情况下，收率均优于常规协议。另外，无催化溶剂的方法将亚锡烷基化学的范围扩展到了空前的应用领域，以还原糖和合成高苄基化的结构单元，而这些过程可以通过更苛刻的程序来获得。从概念的角度来看，所描述的结果表明，无溶剂条件可以帮助开发催化方法，否则该方法在溶液中无效。
• Regioselective mono and multiple alkylation of diols and polyols catalyzed by organotin and its applications on the synthesis of value-added carbohydrate intermediates
  作者：Hengfu Xu、Bo Ren、Wei Zhao、Xiaoting Xin、Yuchao Lu、Yuxin Pei、Hai Dong、Zhichao Pei

  DOI：10.1016/j.tet.2016.04.076

  日期：2016.6

  A catalytic amount of dibutyltin dichloride was used to develop regioselective alkylation of diols and multiple alkylation of polyols. Alkyl groups, including allyl, alkynyl and long-chain alkyl groups, were successfully introduced to one or two hydroxyl groups of carbohydrate and nonsugar substrates. In most cases, excellent isolation yields were obtained. The alkynylated carbohydrates may be used

  催化量的二氯化二丁基锡用于发展二醇的区域选择性烷基化和多元醇的多重烷基化。包括烯丙基，炔基和长链烷基在内的烷基已成功引入到碳水化合物和非糖底物的一个或两个羟基上。在大多数情况下，可获得优异的分离产率。炔化的碳水化合物可用于通过点击反应以高效率合成寡糖模拟物。具有长链烷基的碳水化合物可用作表面活性剂，本研究中的实验进一步证明了这一点。
• Regio/site-selective alkylation of substrates containing a <i>cis</i>-, 1,2- or 1,3-diol with ferric chloride and dipivaloylmethane as the catalytic system
  作者：Jian Lv、Yu Liu、Jia-Jia Zhu、Dapeng Zou、Hai Dong

  DOI：10.1039/c9gc04126e

  日期：——

  In this study, we reported the regio/site-selective alkylation of substrates containing a cis-, 1,2- or 1,3-diol with FeCl3 as a key catalyst. A catalytic system consisting of FeCl3 (0.01–0.1 equiv.) and dipivaloylmethane (FeCl3/dipivaloylmethane = 1/2) was used to catalyze the alkylation in the presence of a base. The produced selectivities and isolated yields were similar to those obtained by methods

  在这项研究中，我们报道了含有顺式-，1,2-或1,3-二醇的底物的区域/位置选择性烷基化，其中FeCl 3为关键催化剂。由FeCl 3（0.01-0.1当量）和二戊酰基甲烷（FeCl 3 / dipivaloylmethane = 1/2）组成的催化体系用于在存在碱的情况下催化烷基化。在大多数情况下，所产生的选择性和分离的产率与使用相同量的FeL 3（L =酰基丙酮配体）作为催化剂的方法所获得的相似。先前报道的用于烷基化的FeL 3催化剂不可商购，并且必须在使用前合成。相反，FeCl 3苯二甲酰甲烷（Hdipm）和二甲戊酰甲烷（Hdipm）是实验室中非常普遍且廉价的无毒试剂，因此使该方法更加绿色且易于操作。机理研究首次证实，FeCl 3最初在乙腈中存在碱的情况下与两当量的Hdipm反应形成[Fe（dipm）3 ]，然后在[[]之间形成五或六元环中间体。 Fe（dipm）3 ]和底物的两个羟