phenyl 2,6-di-O-benzyl-3,4-O-isopropylidene-1-thio-β-D-galactopyranoside | 124476-96-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: phenyl 2,6-di-O-benzyl-3,4-O-isopropylidene-1-thio-β-D-galactopyranoside
• 英文别名: (3aS,4R,6S,7R,7aS)-2,2-dimethyl-7-phenylmethoxy-4-(phenylmethoxymethyl)-6-phenylsulfanyl-4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran
• CAS: 124476-96-6
• 化学式: C₂₉H₃₂O₅S
• 分子量: 492.636
• InChiKey: WSSJTOWJQYTKPS-JYIVOWJTSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.4
• 重原子数：
  35
• 可旋转键数：
  9
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  71.4
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  phenyl 2,6-di-O-benzyl-3,4-O-isopropylidene-1-thio-β-D-galactopyranoside 在 4-二甲氨基吡啶 、 偶氮二异丁腈 、 三正丁基氢锡 、 对甲苯磺酸 、 溶剂黄146 作用下， 以 二氯甲烷 、 水 、 苯 为溶剂， 反应 6.33h， 生成 phenyl 4-O-acetyl-2,6-di-O-benzyl-3-deoxy-1-thio-β-D-xylo-hexopyranoside
  参考文献：
  名称：

  The synthesis of deoxy-α-Gal epitope derivatives for the evaluation of an anti-α-Gal antibody binding

  摘要：

  alpha-Gal epitopes (also termed as alpha-Gal) are carbohydrate structures bearing the alpha-D-Gal-(1 --> 3)-beta-D-Gal terminus 1 and are known to be the antigen responsible for antibody-mediated hyperacute rejection in xenotransplantation. Terminal 2-, 3-, 4-, and 6-deoxy-Gal derivatives of alpha-Gal were synthesized. Inhibition ELISA using mouse laminin was established to determine the binding affinity of the synthesized alpha-Gal derivatives. 4-Deoxy-alpha-Gal derivative 7 showed a significant reduction in antibody recognition. The IC50 value was 15-fold poorer than the standard alpha-Gal epitopes alpha-D-Gal-(1 --> 3)-beta-D-Gal-(1 --> 4)-beta-D-Glc-NHAc (39) and alpha-D-Gal-(1 --> 3)-beta-D-Gal-(1 -- 4)-beta-D-Glc-OBn (40). A similar observation was seen with 2-deoxy-alpha-Gal derivative 5, whose IC50 value was nearly tenfold higher than the standards. Interestingly, substitution at the terminal 3-position resulted in only a fourfold decrease in antibody recognition, suggesting a possible point of future derivation. Finally, 6-deoxy-alpha-Gal derivative 8 exhibited similar antibody recognition to both alpha-Gal epitope 39 and alpha-Gal epitope 40. This strongly suggests that derivatization at the 6-position can be accomplished without loss of antibody recognition. These findings can be utilized for the future design of other alpha-Gal derivatives. (C) 2002 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0008-6215(02)00159-3
• 作为产物：
  描述：

  3,4-O-isopropylidene-6-O-(1-methoxy-1-methylethyl)-1-thio-β-D-galactopyranoside 在 sodium hydride 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 生成 phenyl 2,6-di-O-benzyl-3,4-O-isopropylidene-1-thio-β-D-galactopyranoside
  参考文献：
  名称：

  由苯基硫代糖苷和糖基苯基砜制备吡喃类聚糖衍生物

  摘要：

  摘要具有萘基的锂在室温下于四氢呋喃中处理后，带有各种保护基（缩醛，醚，酯）的苯硫基吡喃葡萄糖吡喃糖类在C-1处进行还原锂化，然后快速去除2-取代基。因此，以优异的产率获得了具有酸不稳定的保护基的吡喃糖基聚糖衍生物。在双相溶剂体系中，在高碘酸钠存在下，用催化量的三氯化钌氧化相应的苯基硫代糖苷，可定量制备缩水甘油基苯基砜。当在四氢呋喃中用萘嵌锂在低温下处理时，这些化合物还以优异的产率产生吡喃类糖基衍生物。还从相应的二糖苯基硫代糖苷制备了β-连接的2'-脱氧二糖糖基衍生物。当用氢化三丁基锡处理时，带有2-黄原酸酯基团的苯基硫代吡喃糖吡喃糖苷经过自由基还原消除，从而在中性条件下以高收率得到糖基衍生物。

  DOI：

  10.1016/0008-6215(89)84061-3

文献信息

• Synthesis of Ganglioside GM3 and GM4 Analogs Having Mimics of Ceramide Moieties and Their Binding Activities with Influenza Virus A.
  作者：Yoshihiro NAGAO、Takahiro NEKADO、Kiyoshi IKEDA、Kazuo ACHIWA

  DOI：10.1248/cpb.43.1536

  日期：——

  5-dideoxy-2-thio-beta-D- galacto-2-nonulopyranosid)onate (10) as the sialosyl donor with suitably protected galactose and lactose acceptors catalyzed by N-bromosuccinimide (NBS), iodine, and tetrabutylammonium trifluoromethanesulfonate (TBAOTf) as the glycosyl promoter in acetonitrile under kinetically controlled conditions. Compound 2 exhibited binding activity towards influenza virus A.

  合成了神经节苷脂GM4（1）和GM3（2）类似物，其中包含神经节苷脂的神经酰胺部分的模拟物。1和2的合成具有甲基（苯基5-乙酰氨基-4,7,8,9-四-O-乙酰基-3,5-二脱氧-2-硫代-β-D-半乳糖-2-壬基吡喃二糖基）的立体选择性糖基化酸）（10）作为唾液酸供体，在动力学控制的条件下，在乙腈中由N-溴代琥珀酰亚胺（NBS），碘和三氟甲磺酸四丁基铵（TBAOTf）催化得到适当保护的半乳糖和乳糖受体。化合物2表现出对流感病毒A的结合活性。
• Convenient syntheses of substituted pyranoid glycals from thiophenyl glycosides and glycosyl phenylsulfones
  作者：Alfonso Fernandez-Mayoralas、Alberto Marra、Michel Trumtel、Alain Veyrières、Pierre Sinaÿ

  DOI：10.1016/s0040-4039(01)80444-5

  日期：1989.1
• Directing effect by remote electron-withdrawing protecting groups at O-3 or O-4 position of donors in glucosylations and galactosylations
  作者：Ju Yuel Baek、Hea-Won Kwon、Se Jin Myung、Jung Jun Park、Mi Young Kim、Dominea C.K. Rathwell、Heung Bae Jeon、Peter H. Seeberger、Kwan Soo Kim

  DOI：10.1016/j.tet.2015.06.014

  日期：2015.8

  Glucosylations and galactosylations of various acceptors with donors possessing an electronwithdrawing benzylsulfonyl, benzoyl, or acetyl group at the O-3 or O-4 position were performed. A beta-directing effect by the benzylsulfonyl group at O-3 of the glucosyl donors and by the benzylsulfonyl and acyl groups at O-4 of the glucosyl donors was observed. In contrast, acyl groups at O-3 of the glucosyl donors and acyl groups at O-3 and O-4 of the galactosyl donors exhibited an alpha-directing effect. The alpha-directing effect is partly considered to remote participation of the acyl groups, whereas the beta-directing effect is somewhat attributed to the S(N)2-like reaction of the acceptor with the glycosyl triflate or the contact ion pair, which is stabilized by remote electron-withdrawing groups. Further evidence for the stability of the alpha-glycosyl triflates was determined by a low-temperature NMR study. (C) 2015 Elsevier Ltd. All rights reserved.
• Development of a highly α-selective galactopyranosyl donor based on a rational design
  作者：Zhitao Li、Lisheng Zhu、Jane Kalikanda

  DOI：10.1016/j.tetlet.2011.08.091

  日期：2011.10

  A galactosyl donor was rationally designed based on protecting group-stereoselectivity study. This donor was prepared and tested in a series of glycosylation reaction. Excellent alpha-selectivity was observed in the test reactions. (C) 2011 Elsevier Ltd. All rights reserved.
• Fast and selective oxidation of thioglycosides to glycosyl sulfoxides using KF/m-CPBA
  作者：Geetanjali Agnihotri、Anup Kumar Misra

  DOI：10.1016/j.tetlet.2005.09.132

  日期：2005.11

  A very fast and selective oxidation of thioglycosides to glycosyl sulfoxides has been achieved using KF/m-CPBA in CH3CN-H2O. This protocol has many advantages compared to the currently available methodologies for this transformation in terms of selectivity, yield, reaction time, control of temperature, etc. The yields obtained were excellent in all cases. (c) 2005 Elsevier Ltd. All rights reserved.