tri-O-allyl-D-lyxo-hexapyranose | 1064075-06-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: tri-O-allyl-D-lyxo-hexapyranose
• 英文别名: 3,4,6-tri-O-2-propenyl-D-galactal；(2R,3R,4R)-3,4-bis(prop-2-enoxy)-2-(prop-2-enoxymethyl)-3,4-dihydro-2H-pyran
• CAS: 1064075-06-4
• 化学式: C₁₅H₂₂O₄
• 分子量: 266.337
• InChiKey: GMXNBEFAYKHZCQ-RBSFLKMASA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2
• 重原子数：
  19
• 可旋转键数：
  10
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  36.9
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  tri-O-allyl-D-lyxo-hexapyranose 在 三氟甲磺酸三甲基硅酯 作用下， 以 二氯甲烷 为溶剂， 反应 1.0h， 生成 N-[(4,5-bis-allyloxy-6-allyloxymethyl-2-propoxy-tetrahydro-pyran-3-yl)-p-tolyl-methyl]-benzamide
  参考文献：
  名称：

  Highly Facialselective Synthesis of Pyranose 1,3-Oxazines and Their Ring Opening with Nucleophiles: A Novel Entry to 2-C-Branched Glycosides

  摘要：

  A TMSOTf-promoted cycloaddition of N-benzoyl-N,O-acetals with various glycals and 3-deoxy glycals affords pyranose 1,3-oxazines with high facial selectivity. In addition, a highly diastereoselective ring opening of the resulting pyranose 1,3-oxazines is reported. With diverse nucleophiles, these reactions take place upon heating at 80 degrees C. This novel ring-opening reaction affords structurally diversified 2-C-branched glycosides with three newly formed contiguous stereocenters.

  DOI：

  10.1021/ol2019604
• 作为产物：
  描述：

  3-溴丙烯 、 (2R,3R,4R)-2-(羟基甲基)-3,4-二氢-2H-吡喃-3,4-二醇 在 sodium hydride 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 15.5h， 以73%的产率得到tri-O-allyl-D-lyxo-hexapyranose
  参考文献：
  名称：

  在中性水性介质中构建的纳米胶束下产生腈氧化物：合成新型基于糖的手性合成子和光学纯的2,8-二氧杂双环[4.4.0]癸烯核。

  摘要：

  报道了一种在中性水性介质中碘代苯将醛肟化学选择性氧化为腈氧化物的高效策略。他们在纳米水性胶束中与烯烃进行原位分子间1,3-偶极环加成反应（1,3-DC），提高了立体选择性，并加快了反应速度，从而合成了新的手性合成子3-（2'-C-3'， 4′，6′-三-O-苄基糖基）-Delta（2）-异恶唑啉等。用这种绿色方法进行光学纯的2,8-二氧杂双环[4.4.0]癸烯骨架的构建，并通过B3LYP密度泛函理论预测了新的手性中心的立体化学。

  DOI：

  10.1021/jo801337k

文献信息

• Lewis acid/base pair as a catalytic system for α-stereoselective synthesis of 2-deoxyglycosides through the addition of alcohols to glycals
  作者：Chen Wang、Haijing Liang、Zhaojun Hang、Zhao-yan Wang、Qinjian Xie、Weihua Xue

  DOI：10.1016/j.tetlet.2020.152643

  日期：2020.12

  report describes the α-stereoselective addition of alcohols to glycals promoted by a cooperative Lewis acid/base pair catalytic system composed of B(C6F5)3 and tetrabutylammonium bromide (TBAB), which provides access to 2-deoxylglycosides in high yields. A mechanistic investigation supported by NMR analysis highlights the possible involvement of nucleophilic addition through boron-induced activation of

  该报告描述了由B（C 6 F 5）3和溴化四丁铵（TBAB）组成的路易斯酸/碱对催化催化体系促进的α-立体选择性醇加成糖，可高产率地获得2-脱氧糖苷。NMR分析支持的机理研究突显了在TBAB的帮助下，通过硼诱导的醇活化，亲核加成可能参与其中。这里讨论的协议具有高的立体选择性，温和的反应条件，廉价且稳定的催化剂以及广泛的底物范围。
• Stereoselective organocatalyzed glycosylations – thiouracil, thioureas and monothiophthalimide act as Brønsted acid catalysts at low loadings
  作者：G. A. Bradshaw、A. C. Colgan、N. P. Allen、I. Pongener、M. B. Boland、Y. Ortin、E. M. McGarrigle

  DOI：10.1039/c8sc02788a

  日期：——

  Thiouracil catalyzes stereoselective glycosylations with galactals in loadings as low as 0.1 mol%.

  硫尿嘧啶在载体负载量低至0.1 mol％时，催化与半乳糖醛糖苷的立体选择性糖基化。
• Cooperative Brønsted Acid-Type Organocatalysis for the Stereoselective Synthesis of Deoxyglycosides
  作者：Carlos Palo-Nieto、Abhijit Sau、Ryan Williams、M. Carmen Galan

  DOI：10.1021/acs.joc.6b02498

  日期：2017.1.6

  α-stereoselective synthesis of deoxyglycosides using cooperative Brønsted acid-type organocatalysis has been developed. The method is tolerant of a wide range of glycoside donors and acceptors, and its versatility is exemplified in the one-pot synthesis of a trisaccharide. Mechanistic studies suggest that thiourea-induced acid amplification of the chiral acid via H-bonding is key for the enhancement

  已经开发了一种使用布朗斯台德酸型有机催化协同催化α-立体选择性合成脱氧糖苷的实用方法。该方法耐受多种糖苷供体和受体，并且其多功能性在三糖的一锅法合成中得到了例证。机理研究表明，硫脲通过氢键引起的手性酸的酸扩增是提高反应速率和产率的关键，而立体控制则取决于酸的手性。
• Iridium-promoted deoxyglycoside synthesis: stereoselectivity and mechanistic insight
  作者：Kumar Bhaskar Pal、Aoxin Guo、Mrinmoy Das、Jiande Lee、Gábor Báti、Benjamin Rui Peng Yip、Teck-Peng Loh、Xue-Wei Liu

  DOI：10.1039/d0sc06529c

  日期：——

  devised a method for stereoselective O-glycosylation using an Ir(I)-catalyst which enables both hydroalkoxylation and nucleophilic substitution of glycals with varying substituents at the C3 position. In this transformation, 2-deoxy-α-O-glycosides were acquired when glycals equipped with a notoriously poor leaving group at C3 were used; in contrast 2,3-unsaturated-α-O-glycosides were produced from glycals

  在本文中，我们设计了一种使用Ir（I）催化剂进行立体选择性O-糖基化的方法，该方法能够在C3位置使用不同的取代基进行糖的加氢烷氧基化和亲核取代。在该转化中，当使用在C3处带有一个臭名昭著的离去基团的糖时，获得了2-脱氧-α- O-糖苷。相反，由在C3具有良好离去基团的糖基产生2，3-不饱和-α - O-糖苷。机制研究表明，这两个反应进行经由所述引导机构，通过其受体坐标到IR（我在α-面配位Ir）的金属（我）-糖基π-复合物，然后以顺式加成方式攻击包含O-糖苷键的糖基。该方案表现出良好的官能团耐受性，并以中等至高收率和优异的立体选择性制备寡糖文库为例。
• Stereoselective Synthesis of 2‐Deoxyglycosides from Glycals by Visible‐Light‐Induced Photoacid Catalysis
  作者：Gaoyuan Zhao、Ting Wang

  DOI：10.1002/anie.201800909

  日期：2018.5.22

  The direct, photoacid‐catalyzed synthesis of 2‐deoxyglycosides from glycals is reported. A series of phenol‐conjugated acridinium‐based organic photoacids were rationally designed, synthesized, and studied alongside the commercially available phenolic catalyst eosin Y. In the presence of such a photoacid catalyst and light, synthetic glycals were activated and coupled with a range of alcohols to afford

  据报道，由糖类直接，光酸催化合成了2-脱氧糖苷。与市售的酚催化剂曙红Y一起，合理设计，合成和研究了一系列基于酚共轭啶基的有机光酸。在这种光酸催化剂和光的存在下，合成糖被活化并与多种醇偶联以高收率和优异的α-选择性提供2-脱氧糖苷。