2,5-dimethylphenyl tosylate | 2493-58-5

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 2,5-dimethylphenyl tosylate
• 英文别名: 2,5-Dimethylphenyl 4-methylbenzenesulfonate；(2,5-dimethylphenyl) 4-methylbenzenesulfonate
• CAS: 2493-58-5
• 化学式: C₁₅H₁₆O₃S
• mdl: MFCD01764283
• 分子量: 276.356
• InChiKey: JRDJDWOQIDHKKI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  19
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  51.8
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  2,5-dimethylphenyl tosylate 在 bis[chloro(1,2,3-trihapto-allylbenzene)palladium(II)] 、 N-[2-二(1-金刚烷)磷苯基]吗啉 、 一水合肼 、 sodium t-butanolate 作用下， 以 甲苯 为溶剂， 反应 1.0h， 生成 (2,5-二甲基苯基)肼
  参考文献：
  名称：

  Diversification of edaravone via palladium-catalyzed hydrazine cross-coupling: Applications against protein misfolding and oligomerization of beta-amyloid

  摘要：

  N-Aryl derivatives of edaravone were identified as potentially effective small molecule inhibitors of tau and beta-amyloid aggregation in the context of developing disease-modifying therapeutics for Alzheimer's disease (AD). Palladium-catalyzed hydrazine monoarylation protocols were then employed as an expedient means of preparing a focused library of 21 edaravone derivatives featuring varied N-aryl substitution, thereby enabling structure-activity relationship (SAR) studies. On the basis of data obtained from two functional biochemical assays examining the effect of edaravone derivatives on both fibril and oligomer formation, it was determined that derivatives featuring an N-biaryl motif were four-fold more potent than edaravone. (C) 2015 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmcl.2015.11.022
• 作为产物：
  描述：

  2,5-二甲基苯酚 、 对甲苯磺酰氯 在 sodium hydroxide 作用下， 以 四氢呋喃 、 水 为溶剂， 反应 2.0h， 以98%的产率得到2,5-dimethylphenyl tosylate
  参考文献：
  名称：

  Chromatography-Free and Eco-Friendly Synthesis of Aryl Tosylates and Mesylates

  摘要：

  Two chromatography-free and eco-friendly protocols have been developed to synthesize aryl tosylates and mesylates by the tosylation and mesylation of the corresponding hydroxyarenes, respectively. These protocols are superior to other known ones regarding the simplicity, reaction time and conditions, the range of substrates, yields, and environmental friendliness.

  DOI：

  10.1055/s-0034-1378867

文献信息

• A General Palladium-Phosphine Complex To Explore Aryl Tosylates in the N-Arylation of Amines: Scope and Limitations
  作者：Pui Ying Choy、Kin Ho Chung、Qingjing Yang、Chau Ming So、Raymond Wai-Yin Sun、Fuk Yee Kwong

  DOI：10.1002/asia.201800575

  日期：2018.9.4

  heterocycles such as indole, carbazole, pyrrole, 10‐phenothiazine, and 10‐phenoxazine were shown to be feasible coupling partners under this catalytic system. The described reaction conditions tolerate a wide range of functional groups and allow an array of aromatic amines as well as unsymmetrical amine products to be easily accessed from the various phenolic derivatives. Interestingly, this catalyst

  提出了使用芳基和杂芳基甲苯磺酸盐对各种胺进行单选择性N-芳基化反应的范围和局限性。空气稳定且易于接近的Pd（OAc）2 / CM-phos CM-phos = 2- [2-（二环己基膦基）苯基] -1-甲基-1 H-吲哚}催化剂体系能够处理各种芳基甲苯磺酸酯底物以及胺亲核试剂，包括伯和仲环状/无环脂族胺和苯胺。在这种催化体系下，含NH的杂环如吲哚，咔唑，吡咯，10-吩噻嗪和10-吩恶嗪被证明是可行的偶联伙伴。所描述的反应条件容许宽范围的官能团，并允许从各种酚衍生物容易地获得一系列的芳族胺以及不对称胺产物。有趣的是，该催化剂体系甚至提供了在水介质中进行反应的机会。我们还报道了旋光性α-中心手性胺与芳基甲苯磺酸盐的分子间偶联，而没有削弱对映体的纯度。
• A P,N-Ligand for Palladium-Catalyzed Ammonia Arylation: Coupling of Deactivated Aryl Chlorides, Chemoselective Arylations, and Room Temperature Reactions
  作者：Rylan J. Lundgren、Brendan D. Peters、Pamela G. Alsabeh、Mark Stradiotto

  DOI：10.1002/anie.201000526

  日期：2010.6.1

  Amazing ammonia: A new air‐stable P,N‐ligand (Mor‐DalPhos) is reported that enables the palladium‐catalyzed cross‐coupling of ammonia to a variety of aryl chloride and aryl tosylate substrates with high chemoselectivity and, for the first time, at room temperature (see scheme; Ad=adamantyl, Ts=para‐toluenesulfonyl).

  惊人的氨气：据报道，一种新型的空气稳定的P，N-配体（Mor-DalPhos）使钯催化的氨气与多种具有高化学选择性的芳基氯和甲苯磺酸芳基酯的交叉偶联成为首次。 ，在室温下（参见方案； Ad =金刚烷基，Ts =对甲苯磺酰基）。
• PROCESS FOR PRODUCING AROMATIC AMINES
  申请人：TAKASAGO INTERNATIONAL CORPORATION

  公开号：US20020035295A1

  公开（公告）日：2002-03-21

  The present invention provides an activator in arylamination using a palladium compound as a catalyst, which is superior to conventional phosphines in stability and performance. With the phosphine sulfide as an activator, an arylamination reaction achieves improved selectivity to produce a desired aromatic amine in an obviously increased yield as compared with a reaction using the corresponding phosphine compound. Moreover, the phosphine sulfide of the invention is impervious to oxidation and exists stably in air and therefore sufficiently withstands use on an industrial scale.

  本发明提供了一种在芳基化反应中使用钯化合物作为催化剂的活化剂，其在稳定性和性能方面优于传统的膦化合物。通过使用膦硫化物作为活化剂，芳基化反应实现了改善的选择性，以明显增加的产量生产所需的芳香胺，与使用相应的膦化合物的反应相比。此外，本发明的膦硫化物不受氧化影响，在空气中存在稳定，因此足以在工业规模上使用。
• 2,2 (Diarlyl) Vinylphosphine compound, palladium catalyst thereof, and process for producing arylamine, diaryl, or arylalkyne with the catalyst
  申请人：——

  公开号：US20020058837A1

  公开（公告）日：2002-05-16

  A novel 2,2-(diaryl)vinylphosphine compound represented by the following general formula (1): 1 (wherein R 1 is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alicyclic group having 5 to 7 carbon atoms, etc.; R 2 , R 3 , R 4 , R 5 , R 6 , and R 7 may be the same or different and each is an alkyl group having 1 to 6 carbon atoms, an alicyclic group having 5 to 7 carbon atoms, etc., provided that R 4 and R 5 taken together and/or R 6 and R 7 taken together may represent a fused benzene ring, a substituted fused benzene ring, a trimethylene group, etc.; and p, q, r, and s each is 0 to 5, provided that p+q and r+s each is in the range of from 0 to 5); a palladium-phosphine catalyst obtained by causing a palladium compound to act on the novel 2,2-(diaryl)vinylphosphine compound; and a process for obtaining an arylamine, a diaryl and an arylalkyne in the presence of the palladium-phosphine catalyst.

  一种由以下通用公式（1）表示的新型2,2-(二芳基)乙烯膦化合物：其中R1是氢原子、具有1至6个碳原子的烷基基团、具有5至7个碳原子的脂环基团等；R2、R3、R4、R5、R6和R7可能相同或不同，每个是具有1至6个碳原子的烷基基团、具有5至7个碳原子的脂环基团等，但要求R4和R5一起和/或R6和R7一起可能代表融合苯环、取代融合苯环、三亚甲基基团等；p、q、r和s每个为0至5，但要求p+q和r+s分别在0至5的范围内；通过使钯化合物作用于新型2,2-(二芳基)乙烯膦化合物而获得的钯-膦催化剂；以及在钯-膦催化剂存在下获得芳胺、二芳基和芳基炔的方法。
• Palladium-Catalyzed Direct α-Arylation of Arylacetonitriles with Aryl Tosylates and Mesylates
  作者：On Ying Yuen、Xiangmeng Chen、Junyu Wu、Chau Ming So

  DOI：10.1002/ejoc.202000176

  日期：2020.3.31

  The first general palladium‐catalyzed α‐arylation of arylacetonitriles with aryl and heteroaryl sulfonates are reported. The catalyst system comprising of Pd(OAc)2 and XPhos is highly effective towards this reaction. A wide range of aryl/heteroaryl tosylates and mesylates are coupled with arylacetonitriles smoothly and catalyst loadings as low as 0.1 mol‐% Pd can be achieved.

  据报道，第一个普通的钯催化的芳基乙腈与芳基和杂芳基磺酸盐的α-芳基化反应。由Pd（OAc）2和XPhos组成的催化剂体系对该反应非常有效。各种各样的芳基/杂芳基甲苯磺酸酯和甲磺酸酯与芳基乙腈平滑地偶联，催化剂负载量可低至0.1 mol％Pd。