5-benzyl-1,2-O-isopropylidene-α-D-xylofuranose | 23202-83-7

• 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: 5-benzyl-1,2-O-isopropylidene-α-D-xylofuranose
• 英文别名: (3aR,5R,6S,6aR)-5-((benzyloxy)methyl)-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxol-6-ol；5′-O-(benzyl)-1′,2′-O-isopropylidene-D-xylofuranose；5-O-benzyl-1,2-O-isopropylidene-α-D-xylofuranoside；1,2-O-isopropylidene-5-O-benzyl-α-D-xylofuranose；5-O-benzyl-1,2-O-isopropylidene-α-D-xylofuranose；1,2-O-isopropylidene-5-O-benzyl-(D)-xylofuranose；(3aR,5R,6S,6aR)-2,2-dimethyl-5-(phenylmethoxymethyl)-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxol-6-ol
• CAS: 23202-83-7；2592-42-9
• 化学式: C₁₅H₂₀O₅
• 分子量: 280.321
• InChiKey: APSVFFKIGXEREP-XJFOESAGSA-N

物化性质

• 熔点：
  81.3 °C
• 沸点：
  415.8±40.0 °C(Predicted)
• 密度：
  1.187±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.1
• 重原子数：
  20
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.6
• 拓扑面积：
  57.2
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  5-benzyl-1,2-O-isopropylidene-α-D-xylofuranose 在 吡啶 、 二乙胺基三氟化硫 作用下， 以 二氯甲烷 为溶剂， 以56%的产率得到5-O-benzyl-3-deoxy-3-fluoro-1,2-O-isopropylidene-α-D-ribofuranose
  参考文献：
  名称：

  3'-Fluoro-3'-脱氧etroset腺嘌呤膦酸酯的合成

  摘要：

  已开发出一种新的合成途径来合成3'-氟-3'-脱氧etroseetrose腺嘌呤膦酸酯。合成从1-木糖开始，关键步骤包括膦酰基甲氧基和腺嘌呤的立体定向引入。另外，区域选择性氟化反应允许进入所需的3'-氟-3'-脱氧四糖部分。该方法允许直接合成3'-氟-3'-脱氧山梨糖腺嘌呤膦酸酯，并且可以扩展为合成其他类型的3'-氟核苷膦酸酯。

  DOI：

  10.1021/acs.joc.7b01482
• 作为产物：
  描述：

  1,2:3,5-双-O-异亚丙基-alpha-D-呋喃木糖 在 sodium hydride 、 溶剂黄146 作用下， 生成 5-benzyl-1,2-O-isopropylidene-α-D-xylofuranose
  参考文献：
  名称：

  An asymmetric Kharasch reaction mediated by d-xylose: long range diastereocontrol

  摘要：

  An asymmetric Kharasch-type atom transfer reaction was studied under 13 different sets of reaction conditions in order to obtain the highest levels of diastereoselection. The highest ratio of 12.5:1 (71%) was observed at low temperatures (-78degreesC) using the Lewis acid Eu(OTf)(3). Because the new asymmetric center is so distant from the D-xylose, we propose a transition state involving two sugars. The conversion of the major product to a naturally occurring chiral gamma-butyrolactone, under basic conditions, is described which also confirmed the diastereoselectivity and absolute stereochemistry of the Kharasch reaction. (C) 2003 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4039(03)00756-1

文献信息

• Synthesis of anomerically pure vinyl sulfone-modified pent-2-enofuranosides and hex-2-enopyranosides: a group of highly reactive Michael acceptors for accessing carbohydrate based synthons
  作者：Aditya Kumar Sanki、Tanmaya Pathak

  DOI：10.1016/s0040-4020(03)01059-7

  日期：2003.9

  from the derivatives of d-xylose. For the synthesis of α- and β-anomers of vinyl sulfone-modified hex-2-enopyranosides, a d-glucose derivative was selected over a d-allose derivative as the starting material because the former almost exclusively produced the required methyl pyranosides whereas the latter produced a mixture. All sulfides were converted to vinyl sulfone-modified carbohydrates by the sequential

  乙烯基砜改性的戊-2-烯呋喃糖苷的苄基或三苯甲基保护的α-和β-端基异构体的合成已通过适当掩蔽的甲基α - lyxo呋喃糖基环氧化合物或甲基β-核糖呋喃糖基环氧化合物的开环而引发。或通过苄基保护的3- O-甲苯磺酰基木糖呋喃糖苷和3- O-甲磺酰基核糖呋喃糖苷中离去基团的亲核取代被p-硫代甲酚。在后一组原料的情况下，α-和β-甲基糖苷仅由d-木糖的衍生物以几乎相等的比例形成。对于乙烯基砜改性的hex-2-enopyranosides的α和β端基异构体的合成，选择d-葡萄糖衍生物而不是d-阿洛糖衍生物作为起始原料，因为前者几乎只能生产所需的甲基吡喃糖苷，而后者产生了混合物。通过顺序应用氧化，甲磺酰化和碱诱导的消除反应，将所有硫化物均转化为乙烯基砜改性的碳水化合物。
• NOVEL STING AGONISTS
  申请人：Venenum Biodesign, LLC

  公开号：US20200131209A1

  公开（公告）日：2020-04-30

  The present invention provides compounds of Formula I′: wherein , W, X, Y, Z, Z 1 , Z 2 , R 1 , R 2 , R 3 , R 4 and R 5 are as defined herein, or a stereoisomer, tautomer, pharmaceutically acceptable salt, prodrug ester or solvate form thereof, wherein all of the variables are as defined herein. These compounds are effective at modulating the STING protein and thus can be used as medicaments for treating or preventing disorders affected by the agonism of STING.

  本发明提供了式I′的化合物： 其中 , W, X, Y, Z, Z 1 , Z 2 , R 1 , R 2 , R 3 , R 4 和R 5 如本文所定义，或其立体异构体、互变异构体、药学上可接受的盐、前药酯或溶剂化合物形式，其中所有变量均如本文所定义。这些化合物能有效调节STING蛋白，因此可用作治疗或预防受STING激动影响的疾病的药物。
• Chiral P,N-Ligands Based on Ketopinic Acid in the Asymmetric Heck Reaction
  作者：Scott R. Gilbertson、Zice Fu

  DOI：10.1021/ol006747b

  日期：2001.1.1

  [figure: see text] Novel chiral P,N-ligands were synthesized from (1S)-(+)-ketopinic acid using palladium-catalyzed coupling reaction of a vinyl triflate and either a diarylphosphine or a dialkylphosphine as the key step. Palladium complexes of these ligands are efficient catalysts for asymmetric Heck reaction between aryl or alkenyl triflates and cyclic alkenes. Products were obtained with good to

  [图：见正文]使用钯催化的三氟甲磺酸乙烯酯与二芳基膦或二烷基膦的偶联反应，由（1S）-（+）-酮酸合成了新型手性P，N-配体。这些配体的钯配合物是芳基或链烯基三氟甲磺酸酯与环状烯烃之间不对称Heck反应的有效催化剂。从1，2-二氢呋喃，环戊烯和4，7-二氢-1，3-二氧杂环丁烷的芳基化和烯基化获得具有良好至优异对映选择性的产物。
• The Synthesis of Carbohydrate α-Amino Acids Utilizing the Corey - Link Reaction
  作者：Adrian Scaffidi、Brian W. Skelton、Robert V. Stick、Allan H. White

  DOI：10.1071/ch04015

  日期：——

  Various carbohydrate ketones (uloses) have been treated with chloroform under strongly basic conditions to yield trichloromethyl tertiary alcohols. These alcohols, when subjected to the conditions of the modified Corey–Link reaction (sodium azide and 1,8-diazabicyclo[5.4.0]undec-7-ene in methanol), generally gave the expected azido ester with complete stereocontrol. Subsequent transformations on these

  已在强碱性条件下用氯仿处理各种碳水化合物酮（乌洛糖）以产生三氯甲基叔醇。这些醇在经受改进的 Corey-Link 反应条件（叠氮化钠和甲醇中的 1,8-二氮杂双环[5.4.0] undec-7-ene）条件下，通常会产生具有完全立体控制的预期叠氮基酯。这些叠氮基酯的后续转化提供了氨基酯、叠氮基酸，在一种情况下还提供了氨基酸。应用于受保护的 d-glucono-1,5-lactone 的类似序列仅部分成功。据报道 1,2:5,6-di-O-isopropylidene-3-C-trichloromethyl 的单晶 X 射线结构-α-d-阿洛糖，(3S)-3-C-azido-3-C-carboxy-3-deoxy-1,2:5,6-di-O-isopropylidene-α-d-ribo-hexose, 1 ,2:5,6-di-O-cyclohexylidene-3-C-trichloromethyl-α-d-gulose
• Regioselective facile synthesis of novel isoxazole-linked glycoconjugates
  作者：Amrita Mishra、Bhuwan B. Mishra、Vinod K. Tiwari

  DOI：10.1039/c5ra05905d

  日期：——

  A concise and efficacious protocol for the regioselective synthesis of novel 3,5-disubstituted isoxazole-linked glycoconjugates (4, 7 and 9) via a 1,3-dipolar cycloaddition reaction between in situ generated glycosyl-β-nitrile oxide (derived from glycosyl-β-nitromethane ester 3 and 6) and various terminal alkynes bearing sugar, alkyl and aryl substituents (2a–n), has been devised. The formation of

  简明和有效的协议，用于新颖的3,5-二取代的异恶唑联糖缀合物（的区域选择性合成4,7和9）通过1,3-偶极环加成反应之间原位产生的糖基- β-氧化腈（来自糖基衍生-β-硝基甲烷酯3和6）以及带有糖，烷基和芳基取代基（2a–n）的各种末端炔烃已被设计出来。DFT计算支持了反应过程中一氧化氮的形成，从而给出了糖基-β-腈氧化物酯的优化结构。这种一锅法的方法提供了一种利用D的方法-葡萄糖衍生的一氧化氮，作为点击化学中新的变异体，用于合成新型异恶唑连接的糖缀合物，为构建基于碳水化合物的多方面生物学特征的支架开辟了一条新途径。