2,3:5,6-di-O-isopropylidene-1-O-(allenyl)-α-D-mannofuranoside | 250127-86-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2,3:5,6-di-O-isopropylidene-1-O-(allenyl)-α-D-mannofuranoside
• CAS: 250127-86-7
• 化学式: C₁₅H₂₂O₆
• 分子量: 298.336
• InChiKey: UTTDODFAHPPZPM-BNDIWNMDSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.9
• 重原子数：
  21
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  55.4
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  2,3:5,6-di-O-isopropylidene-1-O-(allenyl)-α-D-mannofuranoside 在 四氧化锇 、 N-甲基吲哚酮 作用下， 以 丙酮 为溶剂， 反应 12.0h， 以88%的产率得到2,3:5,6-di-O-isopropylidene-α-D-mannofuranose
  参考文献：
  名称：

  Study of metal and acid catalysed deprotection of propargyl ethers of alcohols via their allenyl ethers

  摘要：

  A new method for the deprotection of prop-2-ynyl ethers 1b-9b is described. Isomerisation of 1b-9b to O-allenyl ethers 1d-9d and deprotection by reaction with Hg(OCOCF3)(2), aq.HCl, aq.CF3CO2H and best by use of a catalytic amount of OsO4 is described to obtain the alcohols 1a-9a in good yield. Application of this method for the deprotection of prop-2-enyl ethers 7c,8c,10c-13c via their corresponding prop-1-enyl ethers 7e,8e,10e-13e to obtain the corresponding alcohols 7a,8a,10a-13a is also described, (C) 1999 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4020(99)00631-6
• 作为产物：
  描述：

  (prop-2-ynyloxy) 2,3:5,6-di-O-isopropylidene-α-D-mannofuranoside 在 potassium tert-butylate 作用下， 以 甲苯 为溶剂， 以41%的产率得到2,3:5,6-di-O-isopropylidene-1-O-(allenyl)-α-D-mannofuranoside
  参考文献：
  名称：

  Synthesis of Enantiopure 1-Alkoxyallenes and their 3-Alkylated Derivatives

  摘要：

  一系列手性纯的1-烷氧基丙二烯1a-1f，通过从炔丙基溴和相应的手性醇出发，经由炔丙基醚3a-3f作为中间体而制备得到。此外，通过相应炔烃4a-4c的异构化反应，合成了二取代的手性纯丙二烯衍生物5a-5c。丙二烯衍生物5a还通过另一条途径合成，其中1-三甲基硅基丙二烯衍生物6a作为关键中间体。

  DOI：

  10.1055/s-2001-15225

文献信息

• Hetero Diels-Alder Reactions of Nitroso Alkenes with Alkoxyallene Derivatives Bearing Carbohydrate Auxiliaries: Asymmetric Synthesis of 6<i>H</i>-1,2-Oxazines and Subsequent Reductive Transformations
  作者：Hans-Ulrich Reissig、Reinhold Zimmer、Beate Orschel、Stefan Scherer

  DOI：10.1055/s-2002-33328

  日期：——

  Alkoxyallene derivatives 1a-f bearing carbohydrate auxiliaries at the oxygen were examined in asymmetric hetero Diels­-Alder reactions with nitroso alkenes. Diacetoneglucose derived compound 1a turned out to be the best precursor furnishing the primary cycloadducts 3a-c with a diastereomeric ratio of approximately 90:10. Isomerization provided the thermodynamically more stable 6H-1,2-oxazines 4a-c. Similarly, diacetonefructose derived allene 1f gave compounds 4h-j with good efficiency. Gratifyingly, it turned out that 1a and 1f were complementary with respect to the preferential absolute configuration at C-6 of 6H-1,2-oxazines 4a-c and 4h-j, respectively. Cycloadducts derived from 1a have 6S configuration in excess whereas those derived from 1f are predominantly 6R configured. Exhaustive hydrogenolysis of 6H-1,2-oxazines 4a and 4h in the presence of palladium on charcoal furnished the expected primary amine 5 in an enantioenriched form. If this reduction was performed under addition of hydrochloric acid, pyrrol­idine derivative 6 together with secondary amine 7 as side product were isolated.

  在与亚硝基烯的不对称杂环 Diels-Alder 反应中，研究人员考察了在氧位上含有碳水化合物助剂的烷氧基烯衍生物 1a-f。结果表明，二丙酮葡萄糖衍生的化合物 1a 是最好的前体，可以产生初级环加载物 3a-c，非对映比率约为 90:10。异构化反应产生了热力学上更稳定的 6H-1,2-噁嗪 4a-c。同样，二丙酮果糖衍生的烯 1f 也能高效地生成化合物 4h-j。令人欣慰的是，1a 和 1f 分别在 6H-1,2-噁嗪 4a-c 和 4h-j 的 C-6 绝对构型上具有互补性。由 1a 生成的环加载产物具有过量的 6S 构型，而由 1f 生成的环加载产物则主要具有 6R 构型。在木炭上的钯存在下，对 6H-1,2-噁嗪 4a 和 4h 进行彻底氢解，可以得到预期的对映体形式的伯胺 5。如果在加入盐酸的情况下进行还原，则可分离出吡咯烷衍生物 6 和作为副产物的仲胺 7。
• Study of metal and acid catalysed deprotection of propargyl ethers of alcohols via their allenyl ethers
  作者：Hari Babu Mereyala、Srinivas Reddy Gurrala、S Krishna Mohan

  DOI：10.1016/s0040-4020(99)00631-6

  日期：1999.9

  A new method for the deprotection of prop-2-ynyl ethers 1b-9b is described. Isomerisation of 1b-9b to O-allenyl ethers 1d-9d and deprotection by reaction with Hg(OCOCF3)(2), aq.HCl, aq.CF3CO2H and best by use of a catalytic amount of OsO4 is described to obtain the alcohols 1a-9a in good yield. Application of this method for the deprotection of prop-2-enyl ethers 7c,8c,10c-13c via their corresponding prop-1-enyl ethers 7e,8e,10e-13e to obtain the corresponding alcohols 7a,8a,10a-13a is also described, (C) 1999 Elsevier Science Ltd. All rights reserved.
• Synthesis of Enantiopure 1-Alkoxyallenes and their 3-Alkylated Derivatives
  作者：Arndt Hausherr、Beate Orschel、Stefan Scherer、Hans-Ulrich Reissig

  DOI：10.1055/s-2001-15225

  日期：——

  A series of enantiopure 1-alkoxyallenes 1a-1f was prepared starting from propargyl bromide and the corresponding optically active alcohols via propargyl ethers 3a-3f as intermediates. In addition, disubstituted enantiopure allene derivatives 5a-5c were synthesized by isomerization of the corresponding alkynes 4a-4c. Allene derivative 5a was also prepared via an alternative route with 1-trimethylsilylallene derivative 6a as crucial intermediate.

  一系列手性纯的1-烷氧基丙二烯1a-1f，通过从炔丙基溴和相应的手性醇出发，经由炔丙基醚3a-3f作为中间体而制备得到。此外，通过相应炔烃4a-4c的异构化反应，合成了二取代的手性纯丙二烯衍生物5a-5c。丙二烯衍生物5a还通过另一条途径合成，其中1-三甲基硅基丙二烯衍生物6a作为关键中间体。