(1R,2R,3R,7R,7aR)-1,2,7-triacetoxy-3-(acetoxymethyl)hexahydro-1H-pyrrolizine | 620160-84-1

• 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: (1R,2R,3R,7R,7aR)-1,2,7-triacetoxy-3-(acetoxymethyl)hexahydro-1H-pyrrolizine
• CAS: 620160-84-1
• 化学式: C₁₆H₂₃NO₈
• 分子量: 357.361
• InChiKey: MHBFJGSNXYALFS-OXGONZEZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.2
• 重原子数：
  25.0
• 可旋转键数：
  5.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  108.44
• 氢给体数：
  0.0
• 氢受体数：
  9.0

反应信息

• 作为反应物：
  描述：

  (1R,2R,3R,7R,7aR)-1,2,7-triacetoxy-3-(acetoxymethyl)hexahydro-1H-pyrrolizine 在 potassium carbonate 作用下， 以 甲醇 为溶剂， 反应 24.0h， 以97%的产率得到(1R,2R,3R,7R,7AR)-六氢-3-(羟基甲基)-1H-吡咯里嗪-1,2,7-三醇
  参考文献：
  名称：

  Asymmetric Synthesis of (−)-7-Epiaustraline and (+)-1,7-Diepiaustraline

  摘要：

  A diastereoselective and modular approach to the synthesis of the 3-hydroxymethyl-2,3,5,6,7,7a-hexahydro-1H-pyrrolizine-1,2,7-triol structure, characteristic of several natural pyrrolizidine natural products, has been developed. This approach culminated in the synthesis of (-)-7-epiaustraline and (+)-1,7-diepiaustraline. The oxazolidinone group has been found to be a useful protecting group in the RCM reaction and, as part of a pyrrolo[1,2-c]oxazol-3-one ring system, has functioned as a stereo- and regio-directing group in a key diastereoselective cis-dihydroxylation reaction and a regioselective nucleophilic ring-opening of a S,S-dioxo-dioxathiole.

  DOI：

  10.1021/jo034914q
• 作为产物：
  描述：

  (1R,2R,3R,7R,8R)-3-(phenylmethoxymethyl)-2,3,5,6,7,8-hexahydro-1H-pyrrolizine-1,2,7-triol 在 palladium dichloride 吡啶 、 氢气 作用下， 以 甲醇 为溶剂， 反应 43.0h， 生成 (1R,2R,3R,7R,7aR)-1,2,7-triacetoxy-3-(acetoxymethyl)hexahydro-1H-pyrrolizine
  参考文献：
  名称：

  Asymmetric Synthesis of (−)-7-Epiaustraline and (+)-1,7-Diepiaustraline

  摘要：

  A diastereoselective and modular approach to the synthesis of the 3-hydroxymethyl-2,3,5,6,7,7a-hexahydro-1H-pyrrolizine-1,2,7-triol structure, characteristic of several natural pyrrolizidine natural products, has been developed. This approach culminated in the synthesis of (-)-7-epiaustraline and (+)-1,7-diepiaustraline. The oxazolidinone group has been found to be a useful protecting group in the RCM reaction and, as part of a pyrrolo[1,2-c]oxazol-3-one ring system, has functioned as a stereo- and regio-directing group in a key diastereoselective cis-dihydroxylation reaction and a regioselective nucleophilic ring-opening of a S,S-dioxo-dioxathiole.

  DOI：

  10.1021/jo034914q

文献信息

• Synthesis of (−)-7-Epiaustraline and (−)-1-Epicastanospermine
  作者：Scott E. Denmark、B. Herbert

  DOI：10.1021/jo991990d

  日期：2000.5.1

  Highly efficient and selective syntheses of the title compounds are described. The cornerstone of the synthetic plan is the tandem inter [4 + 2]/inter [3 + 2] cycloaddition process. These syntheses differ from previous applications of this strategy in that they incorporate an alkylation in the hydrogenolysis step to close the second ring of the azabicyclic systems. Notable features of the sequence are (1) the highly regio- and stereoselective [3 + 2] cycloaddition of nitronate 15 with siloxymethyl (Z)-beta-silylvinyl ketone (Z)-22b and (2) the highly selective reduction of the resulting ketone 24a with L-Selectride. A single-crystal X-ray structure analysis of synthetic (-)-7-epiaustraline confirmed that the targeted structure was successfully synthesized. This stimulated a reexamination of the structural assignment of the natural product. (-)-1-Epicastanospermine was synthesized in four steps from the common intermediate 27a. The absolute configuration of (-)-1-epicastanospermine was assured by single-crystal X-ray structure analysis of intermediate (-)-27a. Thus, the sign of the optical rotation had to be revised. The overall efficiency of these syntheses were 9 steps and 23% yield for (-)-7-epiaustraline and 10 steps and 20% yield for (-)-1-epicastanospermine.