allyl 2,3-di-O-benzyl-4,6-O-benzylidene-β-D-galactopyranoside | 71925-96-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃二恶英
• 英文名称: allyl 2,3-di-O-benzyl-4,6-O-benzylidene-β-D-galactopyranoside
• CAS: 71925-96-7
• 化学式: C₃₀H₃₂O₆
• 分子量: 488.58
• InChiKey: JCRSRTNSCMLGIN-ZMIPPXTNSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.2
• 重原子数：
  36.0
• 可旋转键数：
  10.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  55.38
• 氢给体数：
  0.0
• 氢受体数：
  6.0

反应信息

• 作为反应物：
  描述：

  allyl 2,3-di-O-benzyl-4,6-O-benzylidene-β-D-galactopyranoside 在 palladium on activated charcoal 氢氧化钾 、 sodium hydroxide 、 sodium tetrahydroborate 、 sodium periodate 、 硫酸 、 四丁基硫酸氢铵 、 溶剂黄146 作用下， 以 1,4-二氧六环 、 甲醇 、 乙醇 、 二氯甲烷 、 水 、 二甲基亚砜 为溶剂， 反应 80.0h， 生成 3,4-di-O-benzyl-2-O-methyl-L-lyxopyranose
  参考文献：
  名称：

  Olah; Liptak; Harangi, Acta Chimica Hungarica, 1985, vol. 118, # 1, p. 25 - 29

  摘要：

  DOI：
• 作为产物：
  描述：

  allyl-2,3,4,6-tetra-O-acetyl-β-D-galactopyranoside 在 D(+)-10-樟脑磺酸 、 sodium methylate 、 sodium hydride 作用下， 以 甲醇 、 N,N-二甲基甲酰胺 、 乙腈 、 mineral oil 为溶剂， 反应 22.5h， 生成 allyl 2,3-di-O-benzyl-4,6-O-benzylidene-β-D-galactopyranoside
  参考文献：
  名称：

  弗氏志贺氏菌血清型 6 菌株含 O-乙酰基 O 抗原的结构研究及其低聚糖片段的合成

  摘要：

  3C-O-乙酰化和非O-乙酰化目标是从常见的受保护中间体合成的。鼠李糖基化是通过使用亚胺酸酯供体最有效地实现的，包括在半乳糖醛酸苄酯受体的 O-4。相比之下，噻吩 2-脱氧-2-三氯乙酰胺-D-吡喃半乳糖苷前体优选用于涉及残基 B 的链延长。最终 Pd/C 介导的脱保护确保了 O-乙酰基稳定性。所有目标分子都代表了福氏链球菌 6 的 O 抗原的一部分，这是一种流行的血清型。非 O-乙酰化寡糖也是大肠杆菌 O147 O-抗原的片段。噻吩基 2-脱氧-2-三氯乙酰胺-D-吡喃半乳糖苷前体优选用于涉及残基 B 的链延长。最终 Pd/C 介导的脱保护确保 O-乙酰基稳定性。所有目标分子都代表了福氏链球菌 6 的 O 抗原的一部分，这是一种流行的血清型。非 O-乙酰化寡糖也是大肠杆菌 O147 O-抗原的片段。噻吩基 2-脱氧-2-三氯乙酰胺-D-吡喃半乳糖苷前体优选用于涉及残基 B 的链延长。最终

  DOI：

  10.1002/ejoc.201300180

文献信息

• Chemical approach for the syntheses of GM4 isomers with sialic acid to non-natural linkage positions on galactose
  作者：Kenta Kurimoto、Hatsuo Yamamura、Atsushi Miyagawa

  DOI：10.1016/j.carres.2014.10.018

  日期：2015.1

  Cell-surface glycans containing sialic acid are involved in various biological phenomena. However, the syntheses of GM4 derivatives with (2 --> 2) and (2 --> 4) linkages have not been investigated to date. In this study, sialylation of all of the hydroxyl groups on galactose were investigated for the syntheses of GM4 isomers. Regioselective sialylation was achieved via protection of galactosyl acceptors

  含有唾液酸的细胞表面聚糖参与多种生物学现象。但是，迄今尚未研究具有（2-> 2）和（2-> 4）键的GM4衍生物的合成。在这项研究中，对半乳糖上所有羟基的唾液酸化进行了研究，以合成GM4异构体。通过使用富含电子的苄基基团保护半乳糖基受体来实现区域选择性的唾液酸化。这些合成的唾液酸化聚糖将被证明是研究未知碳水化合物介导的生物学角色的有用工具。
• Synthetic Routes to Three Novel Scaffolds for Potential Glycosidase Inhibitors
  作者：Michael Rommel、Alexander Ernst、Ulrich Koert

  DOI：10.1002/ejoc.200700333

  日期：2007.9

  Efficient syntheses of three novel scaffolds for potential β-glycosidase inhibitors were developed: The first consists of a 2,7-dioxabicyclo[2.2.1]heptane derivative, which was prepared by an intramolecular ketalisation. The second scaffold consists of a hydroxylated cyclopentylamine, which could be synthesised stereoselectively from 2-azabicyclo[2.2.1]hept-5-en-3-one. The third scaffold, a 4,5-dihydroxynicotinic

  开发了用于潜在 β-糖苷酶抑制剂的三种新型支架的有效合成：第一种由 2,7-二氧杂双环 [2.2.1] 庚烷衍生物组成，该衍生物通过分子内缩酮化制备。第二个支架由羟基化环戊胺组成，可以立体选择性地从 2-氮杂双环 [2.2.1]hept-5-en-3-one 合成。第三个支架是 4,5-二羟基烟酸，可通过一系列取代基定向的邻位锂化作用获得。选定的化合物作为多种糖苷酶的抑制剂进行了测试。发现三种烟酸衍生物是选择性 β-葡萄糖苷酶抑制剂。（© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007）
• Synthesis of Novel Bicyclic Ketals of Galacturonic Acid as Potential Glycosidase Inhibitors
  作者：Ulrich Koert、Michael Rommel、Alexander Ernst、Klaus Harms

  DOI：10.1055/s-2006-939693

  日期：——

  A synthesis of novel bicyclic ketals of galacturonic acid is described. The key cyclisation step was realised under acidic anhydrous conditions in very good yield. X-ray crystal structure analysis determined the correct regio- and stereochemistry.

  描述了半乳糖醛酸的新型双环缩酮的合成。关键的环化步骤是在酸性无水条件下以非常好的收率实现的。X 射线晶体结构分析确定了正确的区域和立体化学。
• Novel aspects of interaction between UDP-Gal and GlcNAc β-1,4-Galactosyltransferase: Transferability and remarkable inhibitory activity of UDP-(mono-O-methylated Gal), UDP-Fuc and UDP-Man
  作者：Tsuyoshi Endo、Yasuhiro Kajihara、Hisashi Kodama、Hironobu Hashimoto

  DOI：10.1016/s0968-0896(96)00176-9

  日期：1996.11

  Four mono-O-methylated and one mono-O-acetylated UDP-D-Gal analogues and UDP-L-Fuc were synthesized. 2-O-Methyl-D-galactose residue was enzymatically transferred to give 2'-O-methyIlactosaminide in high yield. UDP-Fuc and UDP-Man showed potent inhibitory activities against beta-1,4-galactosyltransferase. Structural requirement and steric allowance for the ground and transition states of the enzyme reaction were discussed. Copyright (C) 1996 Elsevier Science Ltd
• Synthesis of structural elements of the capsular polysaccharide of streptococcus pneumoniae type 8
  作者：Franciscus A.W. Koeman、Johannis P. Kamerling、Johannes F.G. Vliegenthart

  DOI：10.1016/s0040-4020(01)82378-4

  日期：1993.6

  The synthesis is reported of propyl 4-O-alpha-D-galactopyranosyl-beta-D-glucopyranosiduronic acid (25), 4-O-[4-O-(beta-D-glucopyranosyluronic acid)-beta-D-glucopyranosyl]-D-glucopyranose (34), and 4-O-(4-O-beta-D-glucopyranosyl-alpha-D-glucopyranosyl)-D-galactopyranose (38), each representing a structural element of the repeating unit of the capsular polysaccharide of Streptococcus pneumoniae type 8, [-->4)-beta-D-GlcpA-(1-->4)-beta-D-Glcp-(1-->4)-alpha-D-Glcp-(1-->4)-alpha-D-Galp-(1-->]n. 2,3-Di-O-benzyl-4,6-O-benzylidene-alpha-D-galactopyranosyl trichloroacetimidate (12) was coupled to allyl 2-0-acetyl-3-O-benzyl-6-0-trityl-beta-D-glucopyranoside (7) in dichloromethane-ether, using trimethylsilyl trifluoromethanesulfonate as a promoter, to give disaccharide derivative 20. Detritylation of 20, followed by oxidation and deprotection, afforded disaccharide propyl glycoside 25. Coupling of 2,3,4,6-tetra-0-acetyl-alpha-D-glucopyranosyl trichloroacetimidate (8) to allyl 2,3,6-tri-O-benzyl-4-O-(2,3,6-tri-O-benzyl-beta-D-glucopyranosyl)-beta-D-glucopyranoside (17) in dichloromethane, with trimethylsilyl trifluoromethanesulfonate as a promoter, resulted in trisaccharide derivative 26. Deacetylation of 26, followed by 6-O-tritylation, benzylation, detritylation, and oxidation gave a protected trisaccharide derivative (31), which, after deprotection, afforded 34. Coupling of allyl 2,3,6-tri-O-benzyl-beta-D-galactopyranoside (10) to 4-O-(2,3-di-O-benzyl-4,6-O-benzylidene-beta-D-glucopyranosyl)-2,3,6-tri-O-benzyl-D-glucopyranosyl trichloroacetimidate (19) in ether, with trimethylsilyl trifluoromethanesulfonate as a promoter, gave trisaccharide derivative 35. Deallylation of 35, followed by hydrogenolysis afforded 38.