methyl 4-(tosyloxy)benzoate | 51207-43-3

• 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: methyl 4-(tosyloxy)benzoate
• 英文别名: methyl 4-{[(4-methylphenyl)sulfonyl]oxy}benzoate；methyl 4-(4-methylphenyl)sulfonyloxybenzoate
• CAS: 51207-43-3
• 化学式: C₁₅H₁₄O₅S
• mdl: MFCD02668241
• 分子量: 306.339
• InChiKey: GOWDSKTWVLFEKF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  21
• 可旋转键数：
  5
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.133
• 拓扑面积：
  78
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  methyl 4-(tosyloxy)benzoate 在 镍 二甲胺基甲硼烷 、 potassium carbonate 、 三苯基膦 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 6.0h， 以100%的产率得到苯甲酸甲酯
  参考文献：
  名称：

  石墨上镍（Ni / C（g））的非均相催化：芳基甲苯磺酸盐和甲磺酸盐的还原。

  摘要：

  DOI：

  10.1002/anie.200502887
• 作为产物：
  描述：

  4-(tosyloxy)benzoic acid 在 碘 、 zinc trifluoromethanesulfonate 作用下， 以 乙腈 为溶剂， 反应 4.67h， 生成 methyl 4-(tosyloxy)benzoate
  参考文献：
  名称：

  Zn(OTf)₂-Promoted Chemoselective Esterification of Hydroxyl Group Bearing Carboxylic Acids

  摘要：

  Selective esterification of aliphatic and aromatic carboxylic acids with various alcohols is studied using triphenylphosphine, I-2, and a catalytic amount of Zn(OTf)(2). Use of this catalyst allows the formation of esters at a faster rate with good to excellent yield by activating the in situ generated acyloxyphosphonium ion intermediate. During the esterification process, both their aromatic and aliphatic hydroxyl groups are fully preserved from trans-esterification. The results show that the bulkiness and the reactivity of this doubly activated intermediate III control the selectivity and the rate of the reaction, respectively. The method is also useful for direct amidation reactions.

  DOI：

  10.1021/jo302502r

文献信息

• Cleavage of Carboxylic Esters by Aluminum and Iodine
  作者：Dayong Sang、Huaxin Yue、Yang Fu、Juan Tian

  DOI：10.1021/acs.joc.1c00034

  日期：2021.3.5

  A one-pot procedure for deprotecting carboxylic esters under nonhydrolytic conditions is described. Typical alkyl carboxylates are readily deblocked to the carboxylic acids by the action of aluminum powder and iodine in anhydrous acetonitrile. Cleavage of lactones affords the corresponding ω-iodoalkylcarboxylic acids. Aryl acetylates undergo deacetylation with the participation of the neighboring group

  描述了一种在非水解条件下使羧酸酯脱保护的一锅法方法。在无水乙腈中，铝粉和碘的作用下，典型的羧酸烷基酯很容易解封为羧酸。切割内酯得到相应的ω-碘代烷基羧酸。乙酸芳基酯在相邻基团的参与下进行脱乙酰化。该方法能够在芳基酯存在下选择性裂解烷基羧酸酯。
• Iron catalyzed cross coupling reactions of aromatic compounds
  申请人：——

  公开号：US20030220498A1

  公开（公告）日：2003-11-27

  A process for the production of compounds Ar—R 1 by means of a cross-coupling reaction of an organometallic reagent R 1 —M with an aromatic or heteroaromatic substrate Ar—X catalyzed by one or several iron salts or iron complexes as catalysts or pre-catalysts, present homogeneously or heterogeneously in the reaction mixture. This new invention exhibits substantial advantages over established cross coupling methodology using palladium- or nickel complexes as the catalysts. Most notable aspects are the fact that (i) expensive and/or toxic nobel metal catalysts are replaced by cheap, stable, commercially available and toxicologically benign iron salts or iron complexes as the catalysts or pre-catalysts, (ii) commercially attractive aryl chlorides as well as various aryl sulfonates can be used as starting materials, (iii) the reaction can be performed under “ligand-free” conditons, and (iv) the reaction times are usually very short.

  通过使用一种或多种铁盐或铁络合物作为催化剂或前催化剂，在有机金属试剂R1—M与芳香或杂芳底物Ar—X之间进行交叉偶联反应的方法，生产化合物Ar—R1。这一新发明相对于使用钯或镍络合物作为催化剂的传统交叉偶联方法具有显著优势。最值得注意的方面包括：(i) 昂贵和/或有毒的贵金属催化剂被廉价、稳定、商业可获得且毒理学上良性的铁盐或铁络合物替代作为催化剂或前催化剂，(ii) 商业上具吸引力的芳基氯化物以及各种芳基磺酸盐可用作起始材料，(iii) 反应可在“无配体”条件下进行，(iv) 反应时间通常非常短。
• A Mild and Efficient Palladium-Catalyzed Cyanation of Aryl Mesylates in Water or tBuOH/Water
  作者：Pui Yee Yeung、Chau Ming So、Chak Po Lau、Fuk Yee Kwong

  DOI：10.1002/anie.201005121

  日期：2010.11.15

  Cool and compatible: Aryl mesylates and tosylates underwent palladium‐catalyzed cyanation under mild, aqueous conditions at 65–80 °C (see scheme). In many cases, water could be used as the reaction medium without a cosolvent, and a variety of substituents R, such as keto, aldehyde, ester, free amine, and nitrile groups, remained intact during the transformation. Cy=cyclohexyl, Ms=methanesulfonyl,

  凉爽且相容：芳基甲磺酸酯和甲苯磺酸酯在65-80°C的温和水溶液条件下经历了钯催化的氰化反应（请参见方案）。在许多情况下，可以将水用作没有助溶剂的反应介质，并且在转化过程中，各种取代基R（例如酮，醛，酯，游离胺和腈基）保持完整。Cy =环己基，Ms =甲磺酰基，Ts =对甲苯磺酰基。
• Highly Efficient Suzuki-Miyaura Coupling of Aryl Tosylates and Mesylates Catalyzed by Stable, Cost-Effective [1,3-Bis(diphenylphosphino)propane]nickel(II) Chloride [Ni(dppp)Cl2] with only 1 mol% Loading
  作者：Han Gao、You Li、Yi-Guo Zhou、Fu-She Han、Ying-Jie Lin

  DOI：10.1002/adsc.201000710

  日期：2011.2.11

  We present a highly active, inexpensive, universally applicable, and markedly stable [1,3-bis(diphenylphosphino)propane]nickel(II) chloride [Ni(dppp)Cl2] catalyst that is capable of effecting the Suzuki–Miyaura cross-coupling of the inherently less reactive but readily available aryl tosylates and mesylates with only 1 mol% loading and in the absence of extra supporting ligand. Under the optimized

  我们提出了一种高活性，廉价，普遍适用且具有显着稳定性的氯化[1,3-双（二苯基膦基）丙烷]氯化镍（II）[Ni（dppp）Cl 2]催化剂，能够在固有的反应性较低但易于获得的芳基甲苯磺酸盐和甲磺酸盐（仅含1 mol％的负载量）且没有额外的支撑配体的情况下实现Suzuki-Miyaura交叉偶联。在优化的反应条件下，各种活化的，未活化的和失活的以及位阻和杂芳族底物（36个实例）的交叉偶联可以有效地进行，从而以53-99％的收率提供偶联产物。因此，这项工作中提出的结果在通用性，实用性和成本方面为铃木-宫浦交叉偶联提供了重大进展，这是最近有关过渡金属催化交叉偶联研究的重点。
• 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。