methyl 2-(tosyloxy)benzoate | 51207-44-4

• 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 2-(tosyloxy)benzoate
• 英文别名: Methyl 2-[(4-methylbenzenesulfonyl)oxy]benzoate；methyl 2-(4-methylphenyl)sulfonyloxybenzoate
• CAS: 51207-44-4
• 化学式: C₁₅H₁₄O₅S
• 分子量: 306.339
• InChiKey: BHUYDZDOMFVDRA-UHFFFAOYSA-N

物化性质

• 熔点：
  89-90 °C(Solv: methanol (67-56-1))
• 沸点：
  459.5±45.0 °C(Predicted)
• 密度：
  1.291±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  21
• 可旋转键数：
  5
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.13
• 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 2-(tosyloxy)benzoate 在 锰 、 NiBr₂bipy 、 三氟乙酸 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 以93%的产率得到联苯-2,2-二羧酸二甲酯
  参考文献：
  名称：

  Dimerization of Aryl Sulfonates by in situ Generated Nickel(0)

  摘要：

  A mild and user-friendly nickel-catalyzed method for the reductive homocoupling of aromatic tosylates is presented. The reaction proceeds between room temperature and 60 degrees C, with stable substrates (ArOTs) easily prepared from inexpensive and commercially available phenols or naphthols. It relies on a catalytic amount (10 mol%) of a robust catalyst (NiBr(2)bipy) that does not require the preparation of sensitive organometallic intermediates. Yields are good to excellent.

  DOI：

  10.1055/s-0035-1560712
• 作为产物：
  描述：

  2,4-二羟基苯甲酸甲酯 在 镍 TEA 、 potassium tert-butylate 、 氢气 、 三氟甲烷磺酸甲酯 作用下， 以 四氢呋喃 、 乙酸乙酯 、 乙腈 为溶剂， 25.0 ℃ 、413.69 kPa 条件下， 反应 0.33h， 生成 methyl 2-(tosyloxy)benzoate
  参考文献：
  名称：

  The regioselective cleavage of aryl tosylates by electrochemical reduction

  摘要：

  The electrochemical reductions of eight bis(tosyloxy)benzanoid compounds were studied as a method for the regioselective cleavage of aryl tosylates. For the methyl bis(tosyloxy)benzoate isomers, a strong preference was observed for cleavage of the tosyl group in conjugation with the electron-withdrawing ester moiety. Thus it was possible to selectively cleave tosyl groups to the ortho or para positions over tosyl groups at the meta positions. The bis(tosyloxy)anisole isomers displayed the opposite regioselectivity favoring cleavage of tosyl groups that were meta to the electron-donating methoxy substituent. The general electrochemical process for the reduction of aryl tosylates has been shown to be selective, high yielding, and reproducible on gram quantities.

  DOI：

  10.1021/jo00029a010

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。
• Nickel-catalyzed methylation of aryl halides/tosylates with methyl tosylate
  作者：Jiawang Wang、Jianhong Zhao、Hegui Gong

  DOI：10.1039/c7cc06106d

  日期：——

  This work describes the cross-electrophile methylation of aryl bromides and aryl tosylates with methyl tosylate. The mild reaction conditions allow effective methylation of a wide set of heteroaryl electrophiles and dimethylation of dibromoarenes.

  这项工作描述了芳基溴化物和芳基甲苯磺酸盐与甲苯磺酸甲酯的交叉亲电子甲基化。温和的反应条件可实现多种杂芳基亲电子试剂的有效甲基化和二溴芳烃的二甲基化。
• Direct Carboxylation of Aryl Tosylates by CO₂Catalyzed by In situ-Generated Ni⁰
  作者：Fatima Rebih、Manuel Andreini、Aurélien Moncomble、Anne Harrison-Marchand、Jacques Maddaluno、Muriel Durandetti

  DOI：10.1002/chem.201503926

  日期：2016.3.7

  A novel Ni0‐catalyzed carboxylation of aryl tosylates with carbon dioxide has been achieved under moderate temperatures and atmospheric pressure. In this procedure, the active Ni0 species is generated in situ by simply mixing the Ni0 precatalyst [NiBr2(bipy)] with an excess of manganese metal. This approach requires neither a glove‐box nor the tedious preparation of sophisticated intermediate organometallic

  在中等温度和大气压下，已经实现了新的Ni 0催化的甲苯磺酸芳基酯的羧化反应。在此过程中，只需将Ni 0预催化剂[NiBr 2（bipy）]与过量的锰金属混合即可就地生成活性Ni 0物质。这种方法既不需要手套箱，也不需要繁琐的复杂中间体有机金属衍生物的制备。这种温和，方便，用户友好的方法已成功应用于二氧化碳的增值和具有广泛取代基耐受性的通用反应物的合成。
• Sulfonate Versus Sulfonate: Nickel and Palladium Multimetallic Cross-Electrophile Coupling of Aryl Triflates with Aryl Tosylates
  作者：Kai Kang、Liangbin Huang、Daniel J. Weix

  DOI：10.1021/jacs.0c04670

  日期：2020.6.17

  While phenols are frequent and convenient aryl sources in cross-coupling, typically as sulfonate esters, the direct cross-Ullmann coupling of two different sulfonate esters is unknown. We report here a general solution to this chal-lenge catalyzed by a combination of Ni and Pd with Zn reductant and LiBr as an additive. The reaction has broad scope, as demonstrated in 33 examples (65% ± 11% ave yield)

  虽然苯酚是交叉偶联中常见且方便的芳基来源，通常作为磺酸酯，但两种不同磺酸酯的直接交叉乌尔曼偶联尚不清楚。我们在此报告了针对这一挑战的通用解决方案，该解决方案由 Ni 和 Pd 与 Zn 还原剂和 LiBr 作为添加剂的组合催化。该反应具有广泛的范围，如 33 个实例所示（平均产率 65% ± 11%）。机理研究表明，Pd 强烈偏好三氟甲磺酸芳基酯，Ni 催化剂对甲苯磺酸芳基酯的偏好较小，催化剂之间的芳基转移由 Zn 介导，Pd 通过消耗芳基锌中间体来提高产率。
• Generation of Organozinc Reagents by Nickel Diazadiene Complex Catalyzed Zinc Insertion into Aryl Sulfonates
  作者：Philippe Klein、Vivien Denise Lechner、Tanja Schimmel、Lukas Hintermann

  DOI：10.1002/chem.201904545

  日期：2020.1.2

  ArX electrophiles has typically been restricted to iodides and bromides. The insertions of zinc dust into the C-O bonds of various aryl sulfonates (tosylates, mesylates, triflates, sulfamates), or into the C-X bonds of other moderate electrophiles (X=Cl, SMe) are catalyzed by a simple NiCl2 -1,4-diazadiene catalyst system, in which 1,4-diazadiene (DAD) stands for diacetyl diimines, phenanthroline, bipyridine

  通过将锌直接插入ArX亲电试剂的CX键中来生成芳基锌试剂（ArZnX）通常仅限于碘化物和溴化物。锌粉插入各种芳基磺酸盐（甲苯磺酸盐，甲磺酸盐，三氟甲磺酸盐，磺酸盐）的CO键中，或插入其他中等亲电试剂（X = Cl，SMe）的CX键中均通过简单的NiCl2 -1,4-催化二氮杂二烯催化剂体系，其中1,4-二氮杂二烯（DAD）代表二乙酰基二亚胺，菲咯啉，联吡啶和相关配体。现在，在室温下在DMF或N​​MP溶液中进行催化锌化可提供芳基锌磺酸盐，这些芳基锌磺酸盐会经历典型的催化交叉偶联或亲电取代反应。