2-Heptyl-2,3-dihydrobenzopyran | 149548-61-8

• 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: 2-Heptyl-2,3-dihydrobenzopyran
• 英文别名: 2-heptylchromane；2-heptyl-3,4-dihydro-2H-chromene
• CAS: 149548-61-8
• 化学式: C₁₆H₂₄O
• 分子量: 232.366
• InChiKey: MALKXVSIEMWEKF-UHFFFAOYSA-N

物化性质

• 沸点：
  328.5±12.0 °C(Predicted)
• 密度：
  0.939±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  5.8
• 重原子数：
  17
• 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：

  2-Heptyl-2,3-dihydrobenzopyran 在 溴 作用下， 以 乙醇 为溶剂， 以90%的产率得到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
• 作为产物：
  描述：

  2-heptyl-4H-chromen-4-one 在 palladium on activated charcoal 盐酸 、 氢气 作用下， 反应 60.0h， 以95%的产率得到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

• A Modular Synthesis of 2-Alkyl- and 2-Arylchromans via a Three-Step Sequence
  作者：Robert Orr、Louis-Charles Campeau、Harry Chobanian、Jamie McCabe Dunn、Barbara Pio、Christopher Plummer、Andrew Nolting、Rebecca Ruck

  DOI：10.1055/s-0036-1588075

  日期：——

  2-alkylchromans, as well as an azachroman derivative. The asymmetric version of this approach via a Noyori-catalyzed ketone reduction and subsequent cyclization is likewise highlighted. A convergent three-step method for the synthesis of 2-substituted chromans is described. These results have been accomplished via the Heck coupling of readily accessible allylic alcohols and 2-iodophenols, followed by reduction and

  摘要 描述了一种用于合成2-取代的苯并二氢吡喃的收敛三步法。这些结果通过容易获得的烯丙醇和2-碘苯酚的Heck偶联，然后还原和Mitsunobu环化完成。该方法的实用性和通用性通过一系列2-芳基，2-杂芳基和2-烷基苯并二氢吡喃以及氮杂苯并二氢吡喃衍生物的合成得到证明。同样强调了通过Noyori催化的酮还原和随后的环化反应的这种方法的不对称形式。 描述了一种用于合成2-取代的苯并二氢吡喃的收敛三步法。这些结果通过容易获得的烯丙醇和2-碘苯酚的Heck偶联，然后还原和Mitsunobu环化完成。该方法的实用性和通用性通过一系列2-芳基，2-杂芳基和2-烷基苯并二氢吡喃以及氮杂苯并二氢吡喃衍生物的合成得到证明。同样强调了通过Noyori催化的酮还原和随后的环化反应的这种方法的不对称形式。
• 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.