(2R,4S,5R)-4-(Diphenyl-hydrazonomethyl)-2-phenyl-[1,3]dioxan-5-ol | 631912-64-6

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: (2R,4S,5R)-4-(Diphenyl-hydrazonomethyl)-2-phenyl-[1,3]dioxan-5-ol
• CAS: 631912-64-6
• 化学式: C₂₃H₂₂N₂O₃
• 分子量: 374.439
• InChiKey: VJJBFQGMNNODNG-RAJZOWLWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.29
• 重原子数：
  28.0
• 可旋转键数：
  5.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.17
• 拓扑面积：
  54.29
• 氢给体数：
  1.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  (2R,4S,5R)-4-(Diphenyl-hydrazonomethyl)-2-phenyl-[1,3]dioxan-5-ol 在 4-二甲氨基吡啶 、 偶氮二异丁腈 、 三苯基氢化锡 作用下， 以 四氢呋喃 、 苯 为溶剂， 反应 31.5h， 生成 N,N-Diphenyl-N'-((2R,4aR,7R,7aS)-2-phenyl-tetrahydro-furo[3,2-d][1,3]dioxin-7-yl)-hydrazine
  参考文献：
  名称：

  Stereochemical control in radical cyclization routes to N-glycosides: role of protecting groups and of the configuration (E versus Z) of the acceptors

  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 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.

  DOI：

  10.1016/j.tetasy.2003.07.013
• 作为产物：
  描述：

  4,6-O-benzylidene-D-glucose 在 sodium hydroxide 、 sodium periodate 、 4 A molecular sieve 作用下， 以 甲醇 为溶剂， 反应 17.5h， 生成 (2R,4S,5R)-4-(Diphenyl-hydrazonomethyl)-2-phenyl-[1,3]dioxan-5-ol
  参考文献：
  名称：

  Stereochemical control in radical cyclization routes to N-glycosides: role of protecting groups and of the configuration (E versus Z) of the acceptors

  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 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.

  DOI：

  10.1016/j.tetasy.2003.07.013

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.