p-dimethyl-hydroquinone | 36507-38-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: p-dimethyl-hydroquinone
• 英文别名: 1,4-Dimethylcyclohexa-2,5-diene-1,4-diol
• CAS: 36507-38-7
• 化学式: C₈H₁₂O₂
• 分子量: 140.182
• InChiKey: CKJAETQXQRJXLM-UHFFFAOYSA-N

物化性质

• 沸点：
  252.3±40.0 °C(Predicted)
• 密度：
  1.131±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.3
• 重原子数：
  10
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  40.5
• 氢给体数：
  2
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  p-dimethyl-hydroquinone 在 硫酸 作用下， 生成 2,4-二甲基苯酚
  参考文献：
  名称：

  Acid-Catalyzed Dehydration of Substituted Dienediols

  摘要：

  DOI：

  10.1021/jo00131a021
• 作为产物：
  描述：

  1,4-dimethyl-4-nitrocyclohexa-2,5-dien-1-ol 生成 p-dimethyl-hydroquinone
  参考文献：
  名称：

  FISCHER A.; HENDERSON G. N.; SMYTH T. A., CAN. J. CHEM., 64,(1986) N 6, 1093-1101

  摘要：

  DOI：

文献信息

• Organic Semiconductors and Their Manufacture
  申请人：Berens Ulrich

  公开号：US20090299070A1

  公开（公告）日：2009-12-03

  The invention relates to a semiconductor device comprising a compound of the formula I and of the formula XXI, wherein the symbols have the meanings defined in the specification, to the novel compounds of the formula I and XXI and to the use of such a compound as an organic semiconductor for the preparation of an electronic device, and further compounds and devices, as well as other embodiments given in the specification.

  本发明涉及一种半导体器件，包括式I和式XXI的化合物，其中符号的含义在规范中定义，以及式I和XXI的新化合物以及将此类化合物用作有机半导体以制备电子器件，以及规范中给出的其他化合物和器件等其他实施例。
• Stereoselective two-step chemical preparation of 1,4-dialkyl-1,4-dimethoxycyclohexa-2,5-dienes
  作者：Francisco Alonso、Miguel Yus

  DOI：10.1016/s0040-4020(01)89749-0

  日期：1991.8

  phenyllithium) led after hydrolysis with water to the corresponding crude diols 4 which were successively treated with sodium hydride and methyl iodide yielding the expected 1,4-dialkyl-1,4-dimethoxycyclohexa-2,5-dienes 2a-d in a stereoselective manner. The use of a tandem process with two different organolithium reagents followed by methylation by the same procedure yielded stereoselectively the mixed 1-alkyl-4-alkyl'

  对苯醌（1）与几种有机锂化合物（甲基-乙基-正丁基-苯基苯基）的反应在用水水解后导致生成相应的粗二醇4，将其依次用氢化钠和碘甲烷处理，得到预期的1 ，以立体选择性的方式，1，4-二烷基-1，4-二甲氧基环己-2，5-二烯2a-d。使用具有两种不同的有机锂试剂的串联方法，然后通过相同的方法进行甲基化，从而立体选择性地产生了混合的1-烷基-4-烷基′衍生物2e，f。
• PROCESS FOR PRODUCING AROMATIC DIHYDROXY COMPOUND
  申请人：MITSUI CHEMICALS, INC.

  公开号：US20160176795A1

  公开（公告）日：2016-06-23

  [Problem] To provide a process for producing an aromatic dihydroxy compound, in which a hydroquinone compound is highly selectively produced while suppressing formation of by-products derived from a solvent and maintaining a high yield based on hydrogen peroxide when a phenol compound is allowed to react with hydrogen peroxide. [Solution]A process for producing an aromatic dihydroxy compound, including allowing a phenol compound to react with hydrogen peroxide in the presence of a titanosilicate, a C4-C5 alcohol containing a tertiary or quaternary carbon, and water and/or methanol, the amount of the water and/or methanol being 5 to 90 mass % based on the total mass of the reaction liquid.

  [问题] 提供一种生产芳香二羟基化合物的方法，其中在允许苯酚化合物与过氧化氢反应时，高度选择性地产生羟基喹啉化合物，同时抑制溶剂衍生的副产物的形成，并保持基于过氧化氢的高收率。 [解决方案] 一种生产芳香二羟基化合物的方法，包括在钛硅酸盐、含有三级或季碳的C4-C5醇和水和/或甲醇的存在下，允许苯酚化合物与过氧化氢反应，其中水和/或甲醇的量基于反应液的总质量为5到90质量％。
• Solid catalyst component for polymerization of olefins, catalyst comprising the same and use thereof
  申请人：Gao Mingzhi

  公开号：US20050239636A1

  公开（公告）日：2005-10-27

  The present invention provides a solid catalyst component for the polymerization of olefins, comprising magnesium, titanium, a halogen and an electron donor, wherein said electron donor comprises at least one selected from the group consisting of polyol ester compounds of the formula (I): R 1 CO—O—CR 3 R 4 -A-CR 5 R 6 —O—CO—R 2 (I) wherein, R 1 and R 2 groups, which may be identical or different, can be substituted or unsubstituted hydrocarbyl having 1 to 20 carbon atoms, R 3 -R 6 groups, which may be identical or different, can be selected from the group consisting of hydrogen, halogen or substituted or unsubstituted hydrocarbyl having 1 to 20 carbon atoms, R 1 -R 6 groups optionally contain one or more hetero-atoms replacing carbon, hydrogen atom or the both, said hetero-atom is selected from the group consisting of nitrogen, oxygen, sulfur, silicon, phosphorus and halogen atom, two or more of R 3 -R 6 groups can be linked to form saturated or unsaturated monocyclic or polycyclic ring; A is a single bond or bivalent linking group with chain length between two free radicals being 1-10 atoms, wherein said bivalent linking group is selected from the group consisting of aliphatic, alicyclic and aromatic bivalent radicals, and can carry C 1 -C 20 linear or branched substituents; one or more of carbon atom and/or hydrogen atom on above-mentioned bivalent linking group and substituents can be replaced by a hetero-atom selected from the group consisting of nitrogen, oxygen, sulfur, silicon, phosphorus, and halogen atom, and two or more said substituents on the linking group as well as above-mentioned R 3 -R 6 groups can be linked to form saturated or unsaturated monocyclic or polycyclic ring.

  本发明提供了一种用于烯烃聚合的固体催化剂组分，包括镁、钛、卤素和电子给体，其中所述电子给体包括以下至少一种选择自聚醇酯化合物组的化合物（I）：R1CO—O—CR3R4-A-CR5R6—O—CO—R2（I）其中，R1和R2基团可以相同或不同，可以是取代或未取代的1至20个碳原子的烃基，R3-R6基团可以相同或不同，可以选择自氢、卤素或取代或未取代的1至20个碳原子的烃基的群组中，R1-R6基团可以选用一个或多个杂原子代替碳、氢原子或两者，所述杂原子选择自氮、氧、硫、硅、磷和卤素原子的群组，R3-R6基团中的两个或更多个可以连接形成饱和或不饱和的单环或多环环；A是单键或双价连接基团，链长在两个自由基之间为1-10个原子，其中所述双价连接基团选自脂肪族、环脂族和芳香族双价基团的群组，可以携带C1-C20线性或支链取代基；上述双价连接基团和取代基上的一个或多个碳原子和/或氢原子可以被选择自氮、氧、硫、硅、磷和卤素原子的群组中的杂原子取代，两个或更多所述取代基在连接基团上以及上述R3-R6基团中可以连接形成饱和或不饱和的单环或多环环。
• Orthopedic devices, materials and methods
  申请人：UNION CARBIDE CORPORATION

  公开号：EP0003845A1

  公开（公告）日：1979-09-05

  There are provided orthopedic casts, splints, and the like, for use on a portion of a human or animal body, which are produced from a crosslinked copolymer of a lactone monomer and a polyfunctional acrylate monomer. The crosslinked copolymer, in the form of a sheet, web, bandage, etc., and, optionally, a supportive substrate, is heated above the softening point of the copolymer, manipulated to conform to the body portion, and cooled to a rigid state. In one embodiment, there is provided a bandage material, convertible to a rigid, porous, light-weight orthopedic cast, which comprises a substrate in the form of a netting, having on the surfaces of its strands a coating of the aforementioned crosslinked copolymer. The bandage material is heated to a temperature at which the crosslinked copolymer is soft and self-adherent and is then wrapped around the body portion in a series of overlying layers so as to conform to the contours of the body portion. The overlying layers are fused together to form a close-fitting unitary cast and are then cooled to a rigid state.

  本发明提供了用于人体或动物身体部分的矫形石膏、夹板等，它们是由内酯单体和多官能丙烯酸酯单体的交联共聚物制成的。交联共聚物以片状、网状、绷带等形式存在，还可选择使用支撑基材，加热至共聚物软化点以上，使其与身体部分贴合，然后冷却至刚性状态。 在一个实施方案中，提供了一种可转换为刚性、多孔、轻质矫形石膏的绷带材料，它包括网状基材，其股线表面涂有上述交联共聚物。将绷带材料加热到交联共聚物变软并具有自粘性的温度，然后用一系列覆盖层包裹身体部分，使其符合身体部分的轮廓。覆盖层熔合在一起，形成一个紧密贴合的整体铸型，然后冷却至硬质状态。