(1R,2S,7aS)-1,2-dibenzyloxypyrrolizidin-3-one | 820994-22-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡咯里西啶类
• 英文名称: (1R,2S,7aS)-1,2-dibenzyloxypyrrolizidin-3-one
• 英文别名: (1R,2S,8S)-1,2-bis(phenylmethoxy)-1,2,5,6,7,8-hexahydropyrrolizin-3-one
• CAS: 820994-22-7
• 化学式: C₂₁H₂₃NO₃
• 分子量: 337.419
• InChiKey: YTAGAGBDJWBDHH-ZCNNSNEGSA-N

物化性质

• 熔点：
  72-73 °C
• 沸点：
  498.6±45.0 °C(Predicted)
• 密度：
  1.21±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.9
• 重原子数：
  25
• 可旋转键数：
  6
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  38.8
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (1R,2S,7aS)-1,2-dibenzyloxypyrrolizidin-3-one 在 lithium aluminium tetrahydride 作用下， 以 四氢呋喃 为溶剂， 以70%的产率得到(1R,2R,7aS)-1,2-dibenzyloxypyrrolizidine
  参考文献：
  名称：

  Polyhydroxylated pyrrolizidines. Part 5: Stereoselective synthesis of 1,2-dihydroxypyrrolizidines as a model for the preparation of densely polyhydroxylated pyrrolizidines

  摘要：

  The reaction of N-benzyloxycarbonyl-L-prolinal 5 with (methoxycarbonylmethylene)triphenylphosphorane in CH2Cl2 afforded methyl (E)-3-[(2'S)-N-benzyloxycarbonylpyrrolidin-2'-yl]propenoate 7. When the reaction was performed in MeOH, an appreciable amount of the (Z)-isomer 6 was obtained. Compounds 7 and 6 were dihydroxylated to the corresponding 2,3-dihydroxy esters 8-9 and 20 21, respectively. The stereochemistry of the latter compounds could be determined after their transformations into the corresponding 1,2-dihydroxypyrrolizidin-3-ones 11-16 and 23-25, respectively. Finally, lactams 11, 16, and 25 were reduced to the related pyrrolizidines 14, 19, and 27. (C) 2004 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2004.10.003
• 作为产物：
  描述：

  (2S)-N-苄氧羰基-2-吡咯烷甲醛 在 palladium on activated charcoal 、 氢化奎尼定 1,4-(2,3-二氮杂萘)二醚 四氧化锇 、 氢气 、 sodium hydride 、 potassium carbonate 、 potassium hexacyanoferrate(III) 作用下， 以 甲醇 、 水 、 二甲基亚砜 、 异丙醇 为溶剂， 反应 15.0h， 生成 (1R,2S,7aS)-1,2-dibenzyloxypyrrolizidin-3-one
  参考文献：
  名称：

  Polyhydroxylated pyrrolizidines. Part 5: Stereoselective synthesis of 1,2-dihydroxypyrrolizidines as a model for the preparation of densely polyhydroxylated pyrrolizidines

  摘要：

  The reaction of N-benzyloxycarbonyl-L-prolinal 5 with (methoxycarbonylmethylene)triphenylphosphorane in CH2Cl2 afforded methyl (E)-3-[(2'S)-N-benzyloxycarbonylpyrrolidin-2'-yl]propenoate 7. When the reaction was performed in MeOH, an appreciable amount of the (Z)-isomer 6 was obtained. Compounds 7 and 6 were dihydroxylated to the corresponding 2,3-dihydroxy esters 8-9 and 20 21, respectively. The stereochemistry of the latter compounds could be determined after their transformations into the corresponding 1,2-dihydroxypyrrolizidin-3-ones 11-16 and 23-25, respectively. Finally, lactams 11, 16, and 25 were reduced to the related pyrrolizidines 14, 19, and 27. (C) 2004 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2004.10.003

文献信息

• Polyhydroxylated pyrrolizidines. Part 5: Stereoselective synthesis of 1,2-dihydroxypyrrolizidines as a model for the preparation of densely polyhydroxylated pyrrolizidines
  作者：Isidoro Izquierdo、Marı́a T. Plaza、Juan A. Tamayo

  DOI：10.1016/j.tetasy.2004.10.003

  日期：2004.11

  The reaction of N-benzyloxycarbonyl-L-prolinal 5 with (methoxycarbonylmethylene)triphenylphosphorane in CH2Cl2 afforded methyl (E)-3-[(2'S)-N-benzyloxycarbonylpyrrolidin-2'-yl]propenoate 7. When the reaction was performed in MeOH, an appreciable amount of the (Z)-isomer 6 was obtained. Compounds 7 and 6 were dihydroxylated to the corresponding 2,3-dihydroxy esters 8-9 and 20 21, respectively. The stereochemistry of the latter compounds could be determined after their transformations into the corresponding 1,2-dihydroxypyrrolizidin-3-ones 11-16 and 23-25, respectively. Finally, lactams 11, 16, and 25 were reduced to the related pyrrolizidines 14, 19, and 27. (C) 2004 Elsevier Ltd. All rights reserved.