cyclohexyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranoside | 54656-59-6

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: cyclohexyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranoside
• 英文别名: [(2R,3S,4S,5R,6R)-3,4,5-triacetyloxy-6-cyclohexyloxyoxan-2-yl]methyl acetate
• CAS: 54656-59-6
• 化学式: C₂₀H₃₀O₁₀
• 分子量: 430.452
• InChiKey: KXUGJPPWVOJYJB-LCWAXJCOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  30
• 可旋转键数：
  11
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  124
• 氢给体数：
  0
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  cyclohexyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranoside 在 sodium methylate 作用下， 以 甲醇 为溶剂， 以65%的产率得到cyclohexyl-β-D-galactopyranoside
  参考文献：
  名称：

  Synthesis of Deoxy Derivatives of Lactose and their Hydrolysis by beta-Galactosidase from E. Coli.

  摘要：

  Methyl 2-deoxy-alpha-lactoside, methyl 3-deoxy-beta-lactoside, 1,5-anhydro-4-O-beta-D-galactopyranosyl-D-glucitol and the 2-deoxy and 2,3-dideoxy derivatives of 1,5-anhydro-4-O-beta-D-galactopyranosyl-D-glucitol have been synthesized by deoxygenation of lactose derivatives at appropriate positions. Cyclohexyl beta-D-galactopyranoside has also been synthesized. All derivatives proved to be substrates for the enzyme beta-galactosidase from E. coli, but the rate of hydrolysis of the substrate analogues was strongly dependent on the nature of the aglycone.

  DOI：

  10.3891/acta.chem.scand.46-0186
• 作为产物：
  描述：

  环己醇 、 2,3,4,6-四乙酰氧基-alpha-D-吡喃糖溴化物 在 silver carbonate 作用下， 以 二氯甲烷 为溶剂， 以97%的产率得到cyclohexyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranoside
  参考文献：
  名称：

  Synthesis of Deoxy Derivatives of Lactose and their Hydrolysis by beta-Galactosidase from E. Coli.

  摘要：

  Methyl 2-deoxy-alpha-lactoside, methyl 3-deoxy-beta-lactoside, 1,5-anhydro-4-O-beta-D-galactopyranosyl-D-glucitol and the 2-deoxy and 2,3-dideoxy derivatives of 1,5-anhydro-4-O-beta-D-galactopyranosyl-D-glucitol have been synthesized by deoxygenation of lactose derivatives at appropriate positions. Cyclohexyl beta-D-galactopyranoside has also been synthesized. All derivatives proved to be substrates for the enzyme beta-galactosidase from E. coli, but the rate of hydrolysis of the substrate analogues was strongly dependent on the nature of the aglycone.

  DOI：

  10.3891/acta.chem.scand.46-0186

文献信息

• AuCl₃- and AuCl₃-Phenylacetylene-Catalyzed Glycosylations by Using Glycosyl Trichloroacetimidates
  作者：Rashmi Roy、Ashok Kumar Palanivel、Asadulla Mallick、Yashwant D. Vankar

  DOI：10.1002/ejoc.201500137

  日期：2015.6

  obtained for the glycosylation of 2-O-acetyl-protected disarmed glycosyl donors, whereas armed glycosyl trichloroacetimidates gave rise to a mixture of anomeric glycosides. Acid-sensitive nucleophiles such as Fmoc-serine tert-butyl ester or Fmoc-threonine tert-butyl ester successfully underwent the glycosylations, albeit in moderate yields, under mild conditions at room temperature.

  通过使用 AuCl3-苯乙炔中继催化剂体系进行武装和解除武装的三氯乙酰亚胺基糖基供体的糖基化。该催化体系的有效性也与单独使用 作为催化剂的有效性进行了比较。使用这些催化剂的糖基化在室温下在 5-45 分钟内有效进行。2-O-乙酰保护的去武装糖基供体的糖基化获得了优异的非对映选择性，而武装糖基三氯乙酰亚胺产生了异头糖苷的混合物。酸敏感性亲核试剂，如 Fmoc-丝氨酸叔丁酯或 Fmoc-苏氨酸叔丁酯，在室温温和条件下成功地进行了糖基化，尽管产率适中。
• AuCl3-AgOTf promoted O-glycosylation using anomeric sulfoxides as glycosyl donors at room temperature
  作者：Ashokkumar Palanivel、Ande Chennaiah、Sateesh Dubbu、Asadulla Mallick、Yashwant D. Vankar

  DOI：10.1016/j.carres.2016.11.012

  日期：2017.1

  glycosyl donors using AuCl3/AgOTf reagent system has been described. Under optimal reaction conditions, both armed and disarmed glycosyl sulfoxide donors were found to react with a range of primary, secondary, and tertiary alcohol acceptors, and sugar derived glycosyl acceptors to afford the corresponding glycosides in moderate to good yields with predictable selectivity. The reactions are quick (20-60 min)

  已经描述了使用AuCl3 / AgOTf试剂系统将亚砜活化为糖基供体。在最佳反应条件下，发现武装和解除武装的糖基亚砜供体都与一定范围的伯，仲和叔醇受体和糖衍生的糖基受体反应，以中等到良好的产率提供了可预测的选择性的相应糖苷。反应快速（20-60分钟），在室温下容易进行，并且反应条件可耐受酸敏感性基团。
• Metal-free and VOC-free O-glycosylation in supercritical CO₂
  作者：Adrià Cardona、Omar Boutureira、Sergio Castillón、Yolanda Díaz、M. Isabel Matheu

  DOI：10.1039/c7gc00722a

  日期：——

  Supercritical carbon dioxide (scCO2) is a suitable medium to perform transition metal-free glycosylations in the absence of volatile organic solvents (VOCs) using glycosyl halides as glycosyl donors. The methodology here described can be applied for obtaining O-glycosides in a totally green reaction, as well as orthoesters, depending on the reaction conditions. The process is much more sensitive to

  超临界二氧化碳（sc CO 2）是一种合适的介质，可在无挥发性有机溶剂（VOC）的情况下使用糖基卤化物作为糖基供体来进行无过渡金属的糖基化反应。根据反应条件，此处描述的方法可用于在完全绿色反应以及原酸酯中获得O-糖苷。该方法对温度的变化比对压力的改变更为敏感，与糖基溴相比，糖基氯化物需要更高的温度才能被活化。新戊酰基作为良好的CO 2-亲和单元，并被证明是获得良好立体选择性的最佳选择。流体性质和超临界条件的相关性也得到了证明
• Glycosyl Phosphites as Glycosylation Reagents: Scope and Mechanism
  作者：Hirosato Kondo、Shin Aoki、Yoshitaka Ichikawa、Randall L. Halcomb、Helena Ritzen、Chi-Huey Wong

  DOI：10.1021/jo00083a032

  日期：1994.2

  The glycosylation reactions with glycosyl phosphites in the presence of catalytic amounts of TMSOTf at low temperature have been studied with different donors and accepters for the synthesis of several glycosides, including O-glycosides, S-glycosides, C-glycosides, and glycopeptides. Mechanistic investigations of the reactions indicate that the glycosyl phosphite is activated by either TfOH or TMSOTf, depending on how the substrates are mixed. When the acceptor is treated with TMSOTf first, the glycosyl phosphite is activated by the resulting TfOH. The glycosyl phosphite can also be activated by TMSOTf directly. The best result is, however, to mix the acceptor and TMSOTf first, followed by addition of the glycosyl phosphite.
• Glycosidation Promoted by a Reusable Solid Superacid in Supercritical Carbon Dioxide
  作者：Xue-Bing Li、Masato Ogawa、Toshiki Monden、Takahiro Maeda、Eri Yamashita、Mariko Naka、Masao Matsuda、Hiroshi Hinou、Shin-Ichiro Nishimura

  DOI：10.1002/anie.200602161

  日期：2006.8.25