(2S,4S,5R,6R)-5-Azido-4-hydroxy-2-p-tolylsulfanyl-6-((1R,2R)-1,2,3-trihydroxy-propyl)-tetrahydro-pyran-2-carboxylic acid methyl ester | 374573-51-0

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (2S,4S,5R,6R)-5-Azido-4-hydroxy-2-p-tolylsulfanyl-6-((1R,2R)-1,2,3-trihydroxy-propyl)-tetrahydro-pyran-2-carboxylic acid methyl ester
• 英文别名: methyl (2S,4S,5R,6R)-5-azido-4-hydroxy-2-(4-methylphenyl)sulfanyl-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylate
• CAS: 374573-51-0
• 化学式: C₁₇H₂₃N₃O₇S
• 分子量: 413.452
• InChiKey: WQXQBZLKQNUBLM-CXECBNLGSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.1
• 重原子数：
  28
• 可旋转键数：
  8
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.59
• 拓扑面积：
  156
• 氢给体数：
  4
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  (2S,4S,5R,6R)-5-Azido-4-hydroxy-2-p-tolylsulfanyl-6-((1R,2R)-1,2,3-trihydroxy-propyl)-tetrahydro-pyran-2-carboxylic acid methyl ester 在 吡啶 、 N-溴代丁二酰亚胺(NBS) 、 水 、 N,N-二异丙基乙胺 作用下， 以 丙酮 、 乙腈 为溶剂， 反应 5.5h， 生成 methyl (2R,4S,5R,6R)-4-acetyloxy-5-azido-2-diethoxyphosphanyloxy-6-[(1S,2R)-1,2,3-triacetyloxypropyl]oxane-2-carboxylate
  参考文献：
  名称：

  The Thioglycoside and Glycosyl Phosphite of 5-Azido Sialic Acid: Excellent Donors for theα-Glycosylation of Primary Hydroxy Groups

  摘要：

  5-Azido sialyl donors with O-acetyl protecting groups are useful α-selective glycosylation reagents, especially for primary hydroxyl groups as acceptors. This is shown with a variety of reactions using 1 as a sialyl donor. It was also possible to synthesize NeuAcα(2→9)NeuAc as a thioglycoside donor for use in subsequent glycosylations.

  DOI：

  10.1002/1521-3773(20010803)40:15<2900::aid-anie2900>3.0.co;2-4
• 作为产物：
  描述：

  N-acetyl-4,7,8,9-tetra-O-acetyl-2-chloro-2-deoxyneuraminic acid methyl ester 在 甲醇 、 4-二甲氨基吡啶 、 甲烷磺酸 、 triflic azide 、 N,N-二异丙基乙胺 作用下， 以 甲醇 、 二氯甲烷 、 乙腈 为溶剂， 反应 84.0h， 生成 (2S,4S,5R,6R)-5-Azido-4-hydroxy-2-p-tolylsulfanyl-6-((1R,2R)-1,2,3-trihydroxy-propyl)-tetrahydro-pyran-2-carboxylic acid methyl ester
  参考文献：
  名称：

  Donor‐Reactivity‐Controlled Sialylation Reactions

  摘要：

  AbstractAlthough tremendous efforts have been made for the efficient preparation of sialosides, controlling the stereochemical outcome of sialylation reaction still remains one of the most challenging tasks due to the unique chemical structure of sialic acid. We developed a new strategy to statistically analyze the stereoselectivity of sialylation reactions on six types of p‐tolyl thiosialosides in NIS/TfOH system using Relative Reactivity Value (RRV) as the indicator. Analysis of the reaction mechanism showed the formation of the relatively stable glycosyl bromide and glycosyl chloride intermediates from halide‐ and triflate‐containing promotors in the absence of an acceptor. We found that the α/β‐stereoselectivity, yields, and intermediate changes were associated with their donor reactivity. These findings enable to tailor the most suitable building blocks for stereo‐controlled sialylation reactions.

  DOI：

  10.1002/ejoc.202100718

文献信息

• The Thioglycoside and Glycosyl Phosphite of 5-Azido Sialic Acid: Excellent Donors for theα-Glycosylation of Primary Hydroxy Groups
  作者：Chung-Shan Yu、Kenichi Niikura、Chun-Cheng Lin、Chi-Huey Wong

  DOI：10.1002/1521-3773(20010803)40:15<2900::aid-anie2900>3.0.co;2-4

  日期：2001.8.3

  5-Azido sialyl donors with O-acetyl protecting groups are useful α-selective glycosylation reagents, especially for primary hydroxyl groups as acceptors. This is shown with a variety of reactions using 1 as a sialyl donor. It was also possible to synthesize NeuAcα(2→9)NeuAc as a thioglycoside donor for use in subsequent glycosylations.
• Donor‐Reactivity‐Controlled Sialylation Reactions
  作者：Kesatebrhan Haile Asressu、Chun‐Wei Chang、Sarah Lam、Cheng‐Chung Wang

  DOI：10.1002/ejoc.202100718

  日期：2021.8.26

  AbstractAlthough tremendous efforts have been made for the efficient preparation of sialosides, controlling the stereochemical outcome of sialylation reaction still remains one of the most challenging tasks due to the unique chemical structure of sialic acid. We developed a new strategy to statistically analyze the stereoselectivity of sialylation reactions on six types of p‐tolyl thiosialosides in NIS/TfOH system using Relative Reactivity Value (RRV) as the indicator. Analysis of the reaction mechanism showed the formation of the relatively stable glycosyl bromide and glycosyl chloride intermediates from halide‐ and triflate‐containing promotors in the absence of an acceptor. We found that the α/β‐stereoselectivity, yields, and intermediate changes were associated with their donor reactivity. These findings enable to tailor the most suitable building blocks for stereo‐controlled sialylation reactions.