2,5-dimethyl-3,4-dihydro-2H-pyran | 15990-85-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 氧杂环化合物
• 英文名称: 2,5-dimethyl-3,4-dihydro-2H-pyran
• 英文别名: 2,5-dimethyl-3,4-dihydro-2H-pyran
• CAS: 15990-85-9
• 化学式: C₇H₁₂O
• 分子量: 112.172
• InChiKey: FPPTVJSFDYQANP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  8
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.71
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  5-cyano-2-hexanone 在 钾硼氢 、 对甲苯磺酸 作用下， 生成 2,5-dimethyl-3,4-dihydro-2H-pyran
  参考文献：
  名称：

  Colonge,J.; Guigues,F., Bulletin de la Societe Chimique de France, 1967, p. 3881 - 3888

  摘要：

  DOI：

文献信息

• PIPERIDINE DERIVATIVE, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE
  申请人：JNC CORPORATION

  公开号：US20160039758A1

  公开（公告）日：2016-02-11

  To provide a liquid crystal composition containing a compound that is effective in preventing photolysis of the liquid crystal composition, and has high solubility in the liquid crystal composition, and to provide a liquid crystal display device including the composition. The liquid crystal composition contains a compound represented by formula (1), and a liquid crystal display device uses the composition: in which, in formula (1), R 1 to R 8 are hydrogen or alkyl having 1 to 4 carbons; ring A 1 and ring A 2 are cyclohexylene, phenylene, naphthalenediyl or the like; Z 1 , Z 2 and Z 3 are a single bond or the like; and a and b are independently 1 or 2, and c is 0, 1 or 2.

  为了提供一种液晶组合物，其中包含一种化合物，该化合物有效地防止液晶组合物的光解，并且在该液晶组合物中具有高溶解度，以及提供一种包含该组合物的液晶显示器。该液晶组合物包含由公式(1)表示的化合物，而液晶显示器使用该组合物：在公式(1)中，R1至R8是氢或具有1至4个碳原子的烷基；环A1和环A2是环己烯基、苯基、萘基等；Z1、Z2和Z3是单键等；a和b独立地为1或2，而c为0、1或2。
• [EN] LIGAND-CONTROLLED C(SP3)-H ARYLATION AND OLEFINATION IN SYNTHESIS OF UNNATURAL CHIRAL ALPHA AMINO ACIDS<br/>[FR] ARYLATION COMMANDÉE PAR LIGAND DE C(SP3)-H ET OLÉFINATION UTILISABLES DANS LE CADRE DE LA SYNTHÈSE D'ACIDES ALPHA-AMINÉS CHIRAUX NON NATURELS
  申请人：SCRIPPS RESEARCH INST

  公开号：WO2015131100A1

  公开（公告）日：2015-09-03

  The use of ligands to tune the reactivity and selectivity of transition metal-catalysts for C(-sp3)-H bond functionalization is a central challenge in synthetic organic chemistry. Herein, we report a rare example of catalyst-controlled C(sp3)-H arylation using pyridine and quinoline derivatives: the former promotes exclusive monoarylation, whereas the latter activates the catalyst further to achieve diarylation. Successive application of these ligands enables the sequential diarylation of a methyl group in an alanine derivative with two different aryl iodides, affording a wide range of β-Ar-p-Ar ' -cc-amino acids with excellent levels of diastereoselectivity (d.r. > 20:1). Both configurations of the β-chiral center can be accessed by choosing the order in which the aryl groups are installed. The use of a quinoline derivative as a ligand also enables C(sp3)-H olefination of a protected alanine.

  使用配体调节过渡金属催化剂对C(-sp3)-H键官能化的反应性和选择性是合成有机化学中的一个核心挑战。在这里，我们报告了一个罕见的催化剂控制的C(sp3)-H芳基化的例子，使用吡啶和喹啉衍生物：前者促进了独特的单芳基化，而后者进一步激活了催化剂以实现二芳基化。这些配体的连续应用使得在丙氨酸衍生物中的甲基基团上进行顺序二芳基化成为可能，使用两种不同的芳基碘化物，得到了一系列具有优异立体选择性的β-Ar-p-Ar' -cc-氨基酸（d.r. > 20:1）。通过选择芳基基团的安装顺序，可以访问β-手性中心的两种构型。使用喹啉衍生物作为配体还可以实现保护丙氨酸的C(sp3)-H烯烃化。
• DIHYDROPYRAN COMPOUND, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE
  申请人：JNC CORPORATION

  公开号：US20150252264A1

  公开（公告）日：2015-09-10

  To provide a liquid crystal compound satisfying at least one of physical properties such as high stability to ultraviolet light and heat, a high clearing point, low minimum temperature of a liquid crystal phase, small viscosity, suitable optical anisotropy, large dielectric anisotropy and excellent compatibility with other liquid crystal compounds, and a liquid crystal composition containing the compound, and a liquid crystal display device including the composition. The compound includes a compound represented by formula (1): wherein, R a and R b are alkyl or the like; A 1 , A 2 and A 3 are 1,4-cyclohexylene, 1,4-phenylene or the like; G is a divalent group represented by formula (pr-1) or (pr-2); wherein, Z 1 , Z 2 and Z 3 are a single bond, alkylene or the like; and a and b are 0, 1, 2 or 3, and a sum of a and b is 4 or less.

  提供一种液晶化合物，满足至少一种物理性质，如对紫外线和热的高稳定性、高清晰点、液晶相的最低温度低、小粘度、适当的光学各向异性、大介电各向异性以及与其他液晶化合物的良好相容性，并提供一种包含该化合物的液晶组合物和一种包括该组合物的液晶显示装置。该化合物包括式（1）所表示的化合物：其中，Ra和Rb是烷基或类似物；A1、A2和A3是1,4-环己烯基、1,4-苯基或类似物；G是由式（pr-1）或（pr-2）所表示的二价基团；其中，Z1、Z2和Z3是单键、烷基或类似物；a和b分别为0、1、2或3，a和b的总和小于等于4。
• Liquid crystal composition and liquid crystal display device
  申请人：JNC CORPORATION

  公开号：US10174252B2

  公开（公告）日：2019-01-08

  A liquid crystal composition has a negative dielectric anisotropy and contains a specific compound having large negative dielectric anisotropy as a first component, and a specific compound having small viscosity as a second component. The composition may contain a specific compound having high maximum temperature or small viscosity as a third component, a specific compound having negative dielectric anisotropy as a fourth component, or a specific compound having a polymerizable group as an additive component.

  一种液晶组合物具有负介电各向异性，包含作为第一组分的具有较大负介电各向异性的特定化合物和作为第二组分的具有较小粘度的特定化合物。该组合物还可包含具有较高最高温度或较小粘度的特定化合物作为第三组分，具有负介电各向异性的特定化合物作为第四组分，或具有可聚合基团的特定化合物作为添加组分。
• Reduction of Lactones to Hydroxyaldehydes with Lithium Aluminum Hydride
  作者：Glen E. Arth

  DOI：10.1021/ja01106a040

  日期：1953.5