1H-Imidazole-1-carbothioic acid,O-[(2R,4S,5R)-4-[(Z)-(methoxyimino)methyl]-2-phenyl-1,3-dioxan-5-yl]ester | 501373-26-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: 1H-Imidazole-1-carbothioic acid,O-[(2R,4S,5R)-4-[(Z)-(methoxyimino)methyl]-2-phenyl-1,3-dioxan-5-yl]ester
• 英文别名: [2R,4S,5R]-imidazole-1-carbothioic acid O-[4-(methoxyiminomethyl)-2-phenyl-[1,3]dioxan-5-yl] ester；imidazole-1-carbothioic acid O-[4-(S)-(methoxyimino-methyl)-2-(R)-phenyl-[1,3]dioxan-5-(R)-yl] ester
• CAS: 501373-26-8
• 化学式: C₁₆H₁₇N₃O₄S
• 分子量: 347.395
• InChiKey: LIMCOCDXMVXDLP-AHZTXZLLSA-N

物化性质

• 沸点：
  516.0±60.0 °C(Predicted)
• 密度：
  1.34±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.15
• 重原子数：
  24.0
• 可旋转键数：
  4.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  67.1
• 氢给体数：
  0.0
• 氢受体数：
  8.0

反应信息

• 作为反应物：
  描述：

  1H-Imidazole-1-carbothioic acid,O-[(2R,4S,5R)-4-[(Z)-(methoxyimino)methyl]-2-phenyl-1,3-dioxan-5-yl]ester 在 偶氮二异丁腈 、 三苯基氢化锡 作用下， 以 苯 为溶剂， 反应 3.75h， 生成 N-((2R,4aR,6R,7S,7aS)-6-Imidazol-1-yl-2-phenyl-tetrahydro-furo[3,2-d][1,3]dioxin-7-yl)-O-methyl-hydroxylamine 、 N-((2R,4aR,6S,7S,7aS)-6-Imidazol-1-yl-2-phenyl-tetrahydro-furo[3,2-d][1,3]dioxin-7-yl)-O-methyl-hydroxylamine
  参考文献：
  名称：

  A New Reaction Manifold for the Barton Radical Intermediates:  Synthesis of N-Heterocyclic Furanosides and Pyranosides via the Formation of the C₁−C₂ Bond

  摘要：

  The first radical intermediate in the thiourethane-mediated deoxygenation of an alcohol (Barton-McCombie reaction) can participate in an exo-hex-5-enyl- or exo-hept-6-enyl-type radical cyclization when a suitable radical acceptor (e.g., alpha,beta-unsaturated ester, oxime ether, or hydrazone) is appropriately placed. Carbohydrate-derived imidazolyl and triazolyl thiourethanes with such acceptors, upon addition to excess of a good hydride donor (reverse addition), undergo efficient cyclization reactions to give N-heterocyclic furanosides, and, surprisingly even N-pyranosides. Depending on the acceptor, glycosides with either a C(2)()-amino or a C(2)()-carbon substituent are formed.

  DOI：

  10.1021/ja028617z
• 作为产物：
  描述：

  2,4-O-苄叉-D-赤藓糖 在 吡啶 、 4-二甲氨基吡啶 作用下， 以 四氢呋喃 、 甲醇 为溶剂， 反应 25.0h， 生成 1H-Imidazole-1-carbothioic acid,O-[(2R,4S,5R)-4-[(Z)-(methoxyimino)methyl]-2-phenyl-1,3-dioxan-5-yl]ester
  参考文献：
  名称：

  A New Reaction Manifold for the Barton Radical Intermediates:  Synthesis of N-Heterocyclic Furanosides and Pyranosides via the Formation of the C₁−C₂ Bond

  摘要：

  The first radical intermediate in the thiourethane-mediated deoxygenation of an alcohol (Barton-McCombie reaction) can participate in an exo-hex-5-enyl- or exo-hept-6-enyl-type radical cyclization when a suitable radical acceptor (e.g., alpha,beta-unsaturated ester, oxime ether, or hydrazone) is appropriately placed. Carbohydrate-derived imidazolyl and triazolyl thiourethanes with such acceptors, upon addition to excess of a good hydride donor (reverse addition), undergo efficient cyclization reactions to give N-heterocyclic furanosides, and, surprisingly even N-pyranosides. Depending on the acceptor, glycosides with either a C(2)()-amino or a C(2)()-carbon substituent are formed.

  DOI：

  10.1021/ja028617z

文献信息

• Stereochemical control in radical cyclization routes to N-glycosides: role of protecting groups and of the configuration (E versus Z) of the acceptors
  作者：Jong Uk Rhee、Brian I. Bliss、T.V. RajanBabu

  DOI：10.1016/j.tetasy.2003.07.013

  日期：2003.10

  The first radical intermediate in the thiourethane-mediated deoxygenation of an alcohol (Barton-McCombie reaction) can participate in an exo-hex-5-enyl or exo-hept-6-enyl type radical cyclization when a suitable radical acceptor (e.g. alpha,beta-unsaturated ester. oxime ether or hydrazone) is appropriately placed. Carbohydrate-derived imidazolyl and triazolyl thioates with such acceptors. upon addition to excess of a good hydride donor (reverse addition), undergo moderately efficient cyclization reactions to give N-heterocyclic furanosides, and, surprisingly even N-pyranosides. Depending on the acceptor, glycosides with either C-2-carbon or C-2-amino substituents are formed. In the exo-hept-6-enyl cyclizations the (Z)-olefin acceptors give excellent stereoselectivity in the generation of the C-2 stereogenic center: only altro-isomers are formed. In all cases both alpha- and beta-glycosides are obtained with a moderate preference for the latter. (C) 2003 Elsevier Ltd. All rights reserved.