methyl 4-O-benzyl-6-deoxy-2,3-di-O-methyl-α-D-xylo-hex-5-enopyranoside | 120104-34-9

• 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: methyl 4-O-benzyl-6-deoxy-2,3-di-O-methyl-α-D-xylo-hex-5-enopyranoside
• 英文别名: (2S,3R,4S,5S)-2,3,4-trimethoxy-6-methylidene-5-phenylmethoxyoxane
• CAS: 120104-34-9
• 化学式: C₁₆H₂₂O₅
• 分子量: 294.348
• InChiKey: TZHFVNLLZRSUGW-QXSJWSMHSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.6
• 重原子数：
  21
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  46.2
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  methyl 4-O-benzyl-6-deoxy-2,3-di-O-methyl-α-D-xylo-hex-5-enopyranoside 在 吡啶 、 三乙基硅烷 、 4-二甲氨基吡啶 、 potassium osmate(VI) 、 三氟化硼乙醚 、 N-甲基吗啉氧化物 作用下， 以 四氢呋喃 、 二氯甲烷 、 水 为溶剂， 反应 17.0h， 生成 6-O-acetyl-1,5-anhydro-2,3-di-O-methyl-4-O-benzyl-D-glucitol
  参考文献：
  名称：

  Formation of septanoses from hexopyranosides via 5,6-exo-glycals

  摘要：

  Methyl D-hexo-5-ulosides are obtained in high yield by dihydroxylation of 5,6-exo-glucal compounds. The bicyclic structure (1,6-anhydropyrano-5-ulose) of the products is adopted in solution and in solid state in a C-4(1) conformation. This methodology has been used to prepare 1,6-anhydro-L-idopyrano-5-uloses. Further manipulation of the 1,6-anhydro bridge allowed the preparation of the yet unknown septano-5-uloses in moderate to high yields. (C) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.carres.2012.02.026
• 作为产物：
  描述：

  methyl 2,3-di-O-methyl-4-O-benzyl-6-deoxy-6-iodo-α-Dglucopyranoside 在 sodium hydride 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 6.0h， 以80%的产率得到methyl 4-O-benzyl-6-deoxy-2,3-di-O-methyl-α-D-xylo-hex-5-enopyranoside
  参考文献：
  名称：

  Formation of septanoses from hexopyranosides via 5,6-exo-glycals

  摘要：

  Methyl D-hexo-5-ulosides are obtained in high yield by dihydroxylation of 5,6-exo-glucal compounds. The bicyclic structure (1,6-anhydropyrano-5-ulose) of the products is adopted in solution and in solid state in a C-4(1) conformation. This methodology has been used to prepare 1,6-anhydro-L-idopyrano-5-uloses. Further manipulation of the 1,6-anhydro bridge allowed the preparation of the yet unknown septano-5-uloses in moderate to high yields. (C) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.carres.2012.02.026

文献信息

• Intramolecular 1,8-Hydrogen-Atom Transfer Reactions in (1→4)-<i>O</i>-Disaccharide Systems: Conformational and Stereochemical Requirements
  作者：Cosme G. Francisco、Antonio J. Herrera、Alan R. Kennedy、Angeles Martín、Daniel Melián、Inés Pérez-Martín、Luis M. Quintanal、Ernesto Suárez

  DOI：10.1002/chem.200801414

  日期：2008.11.17

  stereochemical and conformational factors controlling the intramolecular hydrogen-atom transfer (HAT) reaction between the two pyranose units in a (1-->4)-O-disaccharide when promoted by a primary 6-O-yl radical are studied. Models with alpha-D-Glcp-(1-->4)-beta-D-Glcp, alpha-L-Rhamp-(1-->4)-alpha-D-Galp or alpha-D-Manp-(1-->4)-beta-L-Gulp skeletons led exclusively to the abstraction of the hydrogen from H--C-5'

  研究了由伯6-O-基团促进时控制（1-> 4）-O-二糖中两个吡喃糖单元之间分子内氢原子转移（HAT）反应的立体化学和构象因素。具有alpha-D-Glcp-（1-> 4）-beta-D-Glcp，alpha-L-Rhamp-（1-> 4）-alpha-D-Galp或alpha-D-Manp-（1的模型-> 4）-β-L-Gulp骨架仅导致从H--C-5'提取氢并通过九元过渡态形成1,3,5-三氧杂环丁烷环系统以稳定的船椅构造为基础。尽管如此，α-L-Rhamp-（1-> 4）-alpha-D-Glcp或alpha-D-Manp-（1-> 4）-alpha-D-Galp的衍生物专门从H- -C-1'通过七元过渡态产生糖苷间螺原酸酯。
• Syntheses of 6-Deoxyhex-5-enopyranosides from 6-Bromo-6-deoxy- or 6-<i>O</i>-<i>p</i>-Tolylsulfonylhexopyranosides by the Use of DBU in DMSO
  作者：Ken-ichi Sato、Noriyuki Kubo、Ritsuko Takada、Shogo Sakuma

  DOI：10.1246/bcsj.66.1156

  日期：1993.4

  Various kinds of nonbranched and methyl-branched 6-deoxyhex-5-enopyranoside derivatives were prepared from 6-bromo-6-deoxy or 6-O-p-tolylsulfonylhexopyranoside in a one-pot procedure by a successive treatment with iodide anion and 1,8-diazabicyclo[5.4.0]undec-7-ene in dimethyl sulfoxide. The scope and limitations of this reaction have become apparent by observing the reactions of 18 substrates. The yields of altropyranoside and 2-deoxyribo-hexopyranoside derivatives were high, except for the 2,3-anhydropyranoside derivative. Methyl-branched 6-deoxyhex-5-enopyranoside derivatives were also obtained in practical yields.

  各种非分支和甲基分支的6-脱氧己-5-烯吡喃苷衍生物是通过将6-溴-6-脱氧或6-O-对甲苯磺酰己吡喃苷与碘离子及1,8-二氮杂双环[5.4.0]十一烯在二甲基亚砜中进行连续处理，采用一锅法制备的。通过观察18种底物的反应，这一反应的范围和局限性变得明显。除了2,3-无水吡喃苷衍生物外，其他的反应产物（如altropyranoside和2-脱氧核糖己吡喃苷衍生物）产率较高。甲基分支的6-脱氧己-5-烯吡喃苷衍生物也以实用的产率获得。
• Synthesis of <scp>l</scp>-Pyranosides by Hydroboration of Hex-5-enopyranosides Revisited
  作者：Grzegorz Łopatkiewicz、Jacek Mlynarski

  DOI：10.1021/acs.joc.6b01243

  日期：2016.9.2

  Extensive study of the diastereoselective synthesis of l-pyranosides utilizing hydroboration of substituted exo-glucals (5-enopyranosides) obtained from d-sugars is presented. On the basis of this study we present the empirical rules describing the reaction stereoselectivity and the correlation between the yield of the l-ido product and the size of protecting groups used. Application of these guidelines

  提出了广泛的研究，利用从d-糖获得的取代的exo-葡糖醛酸（5- enopyranosides）的硼氢化方法对l- pyranosides进行非对映选择性合成。在这项研究的基础上，我们给出了描述反应立体选择性的经验法则，以及l - IDO产物的收率和所用保护基团大小之间的相关性。这些准则的应用表明，甲基2,3-的硼氢化ø甲基-6-脱氧α- d -木糖-己-5-烯吡喃糖苷导致的独家形成升- IDO产品产量高。该方法可以成功地用于合成作为抗凝血药必不可少的非对映体选择性优于以前发表的协议的1-异丁烯二酸。
• Convenient Synthesis of Hex-5-enopyranosides
  作者：Ken-ichi Sato、Noriyuki Kubo、Rituko Takada、Amjad Aqeel、Hironobu Hashimoto、Juji Yoshimura

  DOI：10.1246/cl.1988.1703

  日期：1988.10.5

  Hex-5-enopyranosides were prepared in an one-pot procedure from 6-bromo-6-deoxy- or 6-O-tosylhexopyranoside by the successive treatment with iodide anion and 1,8-diazabicyclo-[5.4.0]undec-7-ene in DMSO.

  通过在二甲基亚砜中连续处理碘离子和1,8-二氮杂双环[5.4.0]十一碳-7-烯，以一锅法从6-溴-6-脱氧-或6-O-对甲苯磺酰基己吡喃糖苷制备了六-5-烯吡喃糖苷。
• SATO, KEN-ICHI;KUBO, N.;TAKADA, R.;HASHIMOTO, H.;YOSHIMURA, J., CHEM. LETT.,(1988) N 10, C. 1703-1704
  作者：SATO, KEN-ICHI、KUBO, N.、TAKADA, R.、HASHIMOTO, H.、YOSHIMURA, J.

  DOI：——

  日期：——