(2R,3R,4R)-3,4-bis(benzyloxy)-2-((benzyloxy)methyl)-3,4-dihydro-2H-pyran-5-carbaldehyde | 136982-88-2

• 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: (2R,3R,4R)-3,4-bis(benzyloxy)-2-((benzyloxy)methyl)-3,4-dihydro-2H-pyran-5-carbaldehyde
• 英文别名: 3,4,6-tri-O-benzyl-2-C-formyl D-galactal；(2R,3R,4R)-3,4-Bis(phenylmethoxy)-2-(phenylmethoxymethyl)-3,4-dihydro-2H-pyran-5-carbaldehyde
• CAS: 136982-88-2
• 化学式: C₂₈H₂₈O₅
• 分子量: 444.527
• InChiKey: PIPPBUYLQJWFCS-FCEKVYKBSA-N

物化性质

• 沸点：
  578.3±50.0 °C(Predicted)
• 密度：
  1.20±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.7
• 重原子数：
  33
• 可旋转键数：
  11
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  54
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  (2R,3R,4R)-3,4-bis(benzyloxy)-2-((benzyloxy)methyl)-3,4-dihydro-2H-pyran-5-carbaldehyde 在 一水合肼 作用下， 以 乙醇 为溶剂， 反应 2.0h， 以95%的产率得到(2R,3S,4R)-1,3,4-tris(phenylmethoxy)-4-(1H-pyrazol-4-yl)butan-2-ol
  参考文献：
  名称：

  An improved synthesis of pyrimidine- and pyrazole-based acyclo-C-nucleosides as carbohybrids

  摘要：

  The synthesis of pyrimidine- and pyrazole-based acyclo-C-nucleosides as carbohybrids was optimized and developed. The synthesis of acyclic polyol-fused pyrimidines was achieved in good to excellent yield with high purity by the cyclocondensation of 2-C-formyl glycals and various amidines using K2CO3 as inorganic base in co-solvent system. In comparison, the syntheses of pyrazole-based acyclo-C-nucleosides were accomplished simply by the cyclocondensation of 2-C-formyl glycals with hydrazine hydrate at room temperature and with phenyl hydrazine at refluxing temperature in ethanol. (c) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2008.06.032
• 作为产物：
  描述：

  3,4,6-三邻苄基半乳醛 在 三氯氧磷 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 生成 (2R,3R,4R)-3,4-bis(benzyloxy)-2-((benzyloxy)methyl)-3,4-dihydro-2H-pyran-5-carbaldehyde
  参考文献：
  名称：

  由C-2甲酰基缩醛合成二羟甲基二羟基吡咯烷和甜菊胺类似物

  摘要：

  已经描述了通过常见的二羰基中间体由C-2甲酰基d-糖合成二羟甲基二羟基吡咯烷。如此获得的吡咯烷已被进一步用于合成一些甜菊胺类似物。已对新合成的分子对6种市售酶的糖苷酶抑制作用进行了评估，发现它们在微摩尔范围内具有活性，其中一种甜菊糖类似物表现出对β-甘露糖苷酶（螺旋藻）的良好且选择性的抑制作用。

  DOI：

  10.1021/jo401613v

文献信息

• Azomethine ylide cycloaddition of 2-C-formyl glycals with α-amino acids for the synthesis of substituted pyrroles
  作者：V. Veerabadhra Reddy、B.V. Subba Reddy

  DOI：10.1016/j.tet.2021.132389

  日期：2021.9

  for the synthesis of pyrrole based acyclo-C-nucleosides, in particular an open-chain sugar substituted pyrrole derivatives by means of the condensation of 2-C-formyl glycals with α-amino acids through an intramolecular azomethine cycloaddition under thermal conditions. The use of cyclic α-amino acids provides the corresponding bicyclic pyrrole derivatives. This is a first report on the synthesis of pyrrole

  一种新的策略已被设计用于吡咯的基于acyclo-合成Ç核苷，特别是开链糖通过2-缩合来取代的吡咯衍生物Ç甲酰基烯糖用α-氨基酸通过分子内甲亚胺环加成在热条件下。环状α-氨基酸的使用提供了相应的双环吡咯衍生物。这是基于吡咯acyclo-合成的第一报告Ç核苷。2009 Elsevier Ltd. 保留所有权利。
• Acetic Anhydride–Acetic Acid as a New Dehydrating Agent of Aldoximes for the Preparation of Nitriles: Preparation of 2-Cyanoglycals
  作者：Henok H. Kinfe、Tommy F. Mabasa、Jackie Mabasa、Mthokozisi Simelane、Banele Vatsha、Banothile C.E. Makhubela

  DOI：10.1055/s-0040-1708007

  日期：2020.6

  Herein, we report a combination of Ac2O and AcOH as new and efficient dehydrating agent of aldoximes for the synthesis of 2-cyanoglycals. In comparison to the conventional dehydrating system of Ac2O-base (such as NaOH, NaOAc and K2CO3), the current protocol provides superior yields and faster reaction rates. The scope and limitations of the dehydrating system are investigated.

  Glycals 是一种 1,2-不饱和碳水化合物，是合成各种支架的通用构件。尽管它们有可能在面向多样性的合成中用作合适的前体，但在合成和衍生化方面对 2-氰基糖的探索较少。在此，我们报告了 Ac2O 和 AcOH 的组合作为用于合成 2-氰基的新型高效醛肟脱水剂。与传统的 Ac2O 碱脱水系统（如 NaOH、NaOAc 和 K2CO3）相比，当前的协议提供了更高的产量和更快的反应速率。研究了脱水系统的范围和局限性。
• Generation of Nitrile Oxides under Nanometer Micelles Built in Neutral Aqueous Media: Synthesis of Novel Glycal-Based Chiral Synthons and Optically Pure 2,8-Dioxabicyclo[4.4.0]decene Core
  作者：Nirbhik Chatterjee、Palash Pandit、Samiran Halder、Amarendra Patra、Dilip K. Maiti

  DOI：10.1021/jo801337k

  日期：2008.10.3

  for chemoselective oxidation of aldoximes to nitrile oxides by iodosobenzene in neutral aqueous media is reported. Their in situ intermolecular 1,3-dipolar cycloaddition (1,3-DC) with olefins in nanometer aqueous micelles occurs with improved stereoselectivity and acceleration of reaction rate toward synthesis of new chiral synthons, 3-(2'-C-3',4',6'-tri-O-benzylglycal)-Delta(2)-isoxazolines and others

  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。
• Stereoselective synthesis of substituted 1,2-annulated sugars by domino double-Michael addition reaction
  作者：Kadigachalam Parasuraman、Ande Chennaiah、Sateesh Dubbu、A.K. Ibrahim Sheriff、Yashwant D. Vankar

  DOI：10.1016/j.carres.2019.03.007

  日期：2019.5

  A simple, highly stereoselective one-pot methodology for the synthesis of novel 1,2-annulated sugars comprising of oxa-oxa and oxa-carbasugar fused skeletons from 2-nitrogalactal and a sugar-derived enone, obtained from 2-formylgalactal, promoted by KOtBu and CH3ONa respectively is described. Both processes rely on a domino double-Michael addition reaction resulting in the formation of three stereocenters

  一种简单，高度立体选择性的一锅法，用于合成新型1，2-环状糖，该糖由2-硝基半乳糖和由2-甲酰基半乳糖制得的糖衍生的烯酮组成，包括oxa-oxa和oxa-carbasugar融合的骨架。分别描述了KOtBu和CH3ONa。两种方法都依赖于多米诺骨牌双迈克尔加成反应，从而在一个锅中形成了三个立体中心，包括一个四元中心。
• [EN] ASGPR-BINDING COMPOUNDS FOR THE DEGRADATION OF EXTRACELLULAR PROTEINS<br/>[FR] COMPOSÉS SE LIANT À L'ASGPR POUR LA DÉGRADATION DE PROTÉINES EXTRACELLULAIRES
  申请人：AVILAR THERAPEUTICS INC

  公开号：WO2021155317A1

  公开（公告）日：2021-08-05

  Compounds and compositions that have an asialoglycoprotein receptor (ASGPR) binding ligand bound to an extracellular protein binding ligand for the selective degradation of the target extracellular protein in vivo to treat disorders mediated by the extracellular protein are described.

  描述了将一个与外细胞蛋白结合配体结合的阿斯利康糖蛋白受体（ASGPR）结合配体的化合物和组合物，用于选择性降解体内靶外细胞蛋白以治疗由外细胞蛋白介导的疾病。