N-dimethylsulfamate de 2,6-dimethylphenyle

• 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: N-dimethylsulfamate de 2,6-dimethylphenyle
• 英文别名: 2,6-dimethylphenyl dimethylsulfamate；2,6-Dimethylphenyl dimethylsulfamate；(2,6-dimethylphenyl) N,N-dimethylsulfamate
• 化学式: C₁₀H₁₅NO₃S
• 分子量: 229.3
• InChiKey: MBFOXCLFVFXBFI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  15
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  55
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  三丁基苯基锡 、 N-dimethylsulfamate de 2,6-dimethylphenyle 在 potassium fluoride 、 bis(1,5-cyclooctadiene)nickel (0) 、 二乙基苯膦 作用下， 以 1,4-二氧六环 为溶剂， 反应 18.0h， 以73%的产率得到1,3-二甲基-2-苯基苯
  参考文献：
  名称：

  镍催化 C-O 亲电子试剂的 Stille 交叉偶联

  摘要：

  在相对不受阻碍的烷基膦配体和 KF 存在下，芳基氨基磺酸盐、甲苯磺酸盐和甲磺酸盐可与多种有机锡烷进行有效的 Ni 催化交叉偶联。该偶联对于使用非三氟甲磺酸酯苯酚衍生物的困难的键构建很有价值，例如芳基-杂芳基、芳基-烯基和芳基-炔基。实验和计算研究的结合揭示了涉及 8 中心循环过渡态的不寻常的金属转移机制。由于 Ni(II)-氯化物中间体上有机锡烷的缓慢金属转移，该反应受到氯化物源的抑制。这些研究有助于解释为什么之前实现苯酚衍生物的 Ni 催化 Stille 偶联的努力不成功。

  DOI：

  10.1021/acscatal.9b00744
• 作为产物：
  描述：

  2,6-二甲基苯酚 、 二甲胺基磺酰氯 在 sodium hydride 作用下， 以 乙二醇二甲醚 、 mineral oil 为溶剂， 以83%的产率得到N-dimethylsulfamate de 2,6-dimethylphenyle
  参考文献：
  名称：

  Iron-Catalyzed Cross-Coupling Reactions of Alkyl Grignards with Aryl Sulfamates and Tosylates

  摘要：

  The iron-catalyzed cross-coupling of aryl sulfamates and tosylates has been achieved with primary and secondary alkyl Grignards. This study of iron-catalyzed cross-coupling reactions also examines the isomerization and beta-hydride elimination problems that are associated with the use of isopropyl nucleophiles. While a variety of iron sources were competent in the reaction, the use of FeF3 center dot 3H(2)O was critical to minimize nucleophile isomerization.

  DOI：

  10.1021/ol303130j

文献信息

• Mechanistic Study of an Improved Ni Precatalyst for Suzuki–Miyaura Reactions of Aryl Sulfamates: Understanding the Role of Ni(I) Species
  作者：Megan Mohadjer Beromi、Ainara Nova、David Balcells、Ann M. Brasacchio、Gary W. Brudvig、Louise M. Guard、Nilay Hazari、David J. Vinyard

  DOI：10.1021/jacs.6b11412

  日期：2017.1.18

  function at room temperature. Mechanistic studies on precatalyst activation and the speciation of nickel during catalysis reveal that Ni(I) species are formed in the catalytic reaction via two different pathways: (i) the precatalyst (dppf)Ni(o-tolyl)(Cl) undergoes comproportionation with the active Ni(0) species; and (ii) the catalytic intermediate (dppf)Ni(Ar)(sulfamate) (Ar = aryl) undergoes comproportionation

  对于 Suzuki-Miyaura 偶联反应，镍预催化剂可能是传统钯预催化剂的更可持续的替代品。目前，Suzuki-Miyaura 偶联反应引起了人们极大的兴趣，该反应涉及容易获得的酚类衍生物，例如氨基磺酸芳基酯，因为氨基磺酸酯部分可以作为一个导向基团，用于在交叉偶联之前对亲电子试剂的芳香骨架进行预官能化。通过评估 Ni(0)、(I) 和 (II) 氧化态的配合物，我们报告了一种前催化剂，(dppf)Ni(o-tolyl)(Cl) (dppf = 1,1'-bis(diphenylphosphino)ferrocene )，对于涉及芳基氨基磺酸酯和硼酸的 Suzuki-Miyaura 偶联反应，与其他报道的系统相比，该反应在显着更低的催化剂负载和更温和的反应条件下运行。在某些情况下，它甚至可以在室温下工作。对催化剂前体活化和催化过程中镍形态形成的机理研究表明，Ni(I) 物种在催化反应中通过两种不同的途径形成：(i)
• Rapid Nickel-Catalyzed Suzuki−Miyaura Cross-Couplings of Aryl Carbamates and Sulfamates Utilizing Microwave Heating
  作者：Mostafa Baghbanzadeh、Christian Pilger、C. Oliver Kappe

  DOI：10.1021/jo1024464

  日期：2011.3.4

  High-speed and scalable nickel-catalyzed cross-coupling of arylboronic acids with aryl carbamates and sulfamates is achieved by using sealed-vessel microwave processing.
• Suzuki−Miyaura Cross-Coupling of Aryl Carbamates and Sulfamates: Experimental and Computational Studies
  作者：Kyle W. Quasdorf、Aurora Antoft-Finch、Peng Liu、Amanda L. Silberstein、Anna Komaromi、Tom Blackburn、Stephen D. Ramgren、K. N. Houk、Victor Snieckus、Neil K. Garg

  DOI：10.1021/ja200398c

  日期：2011.4.27

  The first Suzuki-Miyaura cross-coupling reactions of the synthetically versatile aryl O-carbamate and O-sulfamate groups are described. The transformations utilize the inexpensive, bench-stable catalyst NiCl2(PCy3)(2) to furnish biaryls in good to excellent yields. A broad scope for this methodology has been demonstrated. Substrates with electron-donating and electron-withdrawing groups are tolerated, in addition to those that possess ortho substituents. Furthermore, heteroaryl substrates may be employed as coupling partners. A computational study providing the full catalytic cycles for these cross-coupling reactions is described. The oxidative addition with carbamates or sulfamates occurs via a five-centered transition state, resulting in the exclusive cleavage of the aryl C-O bond. Water is found to stabilize the Ni-carbamate catalyst resting state, which thus provides rationalization of the relative decreased rate of coupling of carbamates. Several synthetic applications are presented to showcase the utility of the methodology in the synthesis of polysubstituted aromatic compounds of natural product and bioactive molecule interest.
• Ni(COD)₂/PCy₃ Catalyzed Cross-Coupling of Aryl and Heteroaryl Neopentylglycolboronates with Aryl and Heteroaryl Mesylates and Sulfamates in THF at Room Temperature
  作者：Pawaret Leowanawat、Na Zhang、Ana-Maria Resmerita、Brad M. Rosen、Virgil Percec

  DOI：10.1021/jo202037x

  日期：2011.12.16

  Reaction conditions for the Ni(COD)(2)/PCy3 catalyzed cross-coupling of aryl neopentylglycolboronates with aryl mesylates were developed. By using optimized reaction conditions, Ni(COD)(2)/PCy3 was shown to be a versatile catalyst for the cross-coupling of a diversity of aryl neopentylglycolboronates with aryl and heteroaryl mesylates and sulfamates containing both electron-donating and electron-withdrawing substituents in their para, ortho, and meta positions in THF at room temperature. This Ni-catalyzed cross-coupling of aryl neopentylglycolboronates is also effective for the synthesis of heterobiaryls and biaryls containing electrophilic functionalities sensitive to organolithium and organomagnesium derivatives. In combination with the recently developed Ni-catalyzed neopentylglycolborylation, all Ni-catalyzed routes to functional biaryls and heterobiaryls are now easily accessible.
• Beji, Mohamed; Hedayatullah, Mir, Phosphorus and Sulfur and the Related Elements, 1986, vol. 27, p. 293 - 296
  作者：Beji, Mohamed、Hedayatullah, Mir

  DOI：——

  日期：——