(S)-(-)-6-Bromo-2-heptyl-2,3-dihydrobenzopyran | 158704-30-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡喃
• 英文名称: (S)-(-)-6-Bromo-2-heptyl-2,3-dihydrobenzopyran
• 英文别名: (2S)-6-bromo-2-heptyl-3,4-dihydro-2H-chromene
• CAS: 158704-30-4
• 化学式: C₁₆H₂₃BrO
• 分子量: 311.262
• InChiKey: ZBRDXFJDTATEPM-HNNXBMFYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.5
• 重原子数：
  18
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.62
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  (S)-(-)-6-Bromo-2-heptyl-2,3-dihydrobenzopyran 在 正丁基锂 、 氯化亚砜 作用下， 以 乙醚 为溶剂， 反应 1.75h， 生成 (2S)-2-heptyl-3,4-dihydro-2H-chromene-6-carbonyl chloride
  参考文献：
  名称：

  Synthesis and Properties of a New Family of Chiral Mesogens Containing the 2,3-Dihydrobenzopyran Nucleus

  摘要：

  A new class of mesogens A with a central chiral core based on the 2,3-dihydrobenzopyran nucleus was synthesized both in the racemic and optically pure form, and the thermotropic properties were studied. The distortion from structural linearity due to the presence of the 2,3-dihydropyran ring does not inhibit the existence of mesophases, and Ch, S-A, and S-C phases were observed according to the substituents present. The conformational constrictions imposed by cyclization proved not to be very important in determining the compactness of the cholesteric helix.

  DOI：

  10.1021/jo00099a022
• 作为产物：
  描述：

  (S)-(-)-2-Heptyl-2,3-dihydrobenzopyran 在 溴 作用下， 以 乙醇 为溶剂， 以87%的产率得到(S)-(-)-6-Bromo-2-heptyl-2,3-dihydrobenzopyran
  参考文献：
  名称：

  Synthesis and Properties of a New Family of Chiral Mesogens Containing the 2,3-Dihydrobenzopyran Nucleus

  摘要：

  A new class of mesogens A with a central chiral core based on the 2,3-dihydrobenzopyran nucleus was synthesized both in the racemic and optically pure form, and the thermotropic properties were studied. The distortion from structural linearity due to the presence of the 2,3-dihydropyran ring does not inhibit the existence of mesophases, and Ch, S-A, and S-C phases were observed according to the substituents present. The conformational constrictions imposed by cyclization proved not to be very important in determining the compactness of the cholesteric helix.

  DOI：

  10.1021/jo00099a022

文献信息

• Synthesis and Properties of a New Family of Chiral Mesogens Containing the 2,3-Dihydrobenzopyran Nucleus
  作者：Bianca F. Bonini、Paolo Carboni、Giovanni Gottarelli、Stefano Masiero、Gian Piero Spada

  DOI：10.1021/jo00099a022

  日期：1994.10

  A new class of mesogens A with a central chiral core based on the 2,3-dihydrobenzopyran nucleus was synthesized both in the racemic and optically pure form, and the thermotropic properties were studied. The distortion from structural linearity due to the presence of the 2,3-dihydropyran ring does not inhibit the existence of mesophases, and Ch, S-A, and S-C phases were observed according to the substituents present. The conformational constrictions imposed by cyclization proved not to be very important in determining the compactness of the cholesteric helix.