1-bromo-2-(diazomethyl)benzene | 1278594-22-1

• 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: 1-bromo-2-(diazomethyl)benzene
• 英文别名: 1-Bromo-2-(diazomethyl)benzene
• CAS: 1278594-22-1
• 化学式: C₇H₅BrN₂
• 分子量: 197.034
• InChiKey: OGUSIJYDHYAXSI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  10
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  1-bromo-2-(diazomethyl)benzene 、 邻氟苯甲酸 以 氘代氯仿 、 甲苯 为溶剂， 生成 2-bromobenzyl 2-fluorobenzoate
  参考文献：
  名称：

  氟NMR滴定不稳定的重氮烷溶液。

  摘要：

  报道了通过定量19 F NMR滴定不稳定的重氮烷溶液的新方案。用重氮烷溶液在低温下处理溶解在CDCl 3中的过量的2-氟苯甲酸，在加热后立即形成相应的2-氟苯甲酸酯。观察到酯和酸之间在19 F化学位移方面存在显着差异，从而可以轻松，准确地积分来确定滴度。该过程安全，快速，并且可以高精度指示活性重氮烷浓度。

  DOI：

  10.1021/jo202214e
• 作为产物：
  描述：

  2-bromobenzaldehyde hydrazone 在 草酰氯 、 二甲基亚砜 、 三乙胺 作用下， 以 乙醚 、 二氯甲烷 为溶剂， 反应 0.75h， 生成 1-bromo-2-(diazomethyl)benzene
  参考文献：
  名称：

  An Enantioselective Synthesis of 2-Aryl Cycloalkanones by Sc-Catalyzed Carbon Insertion

  摘要：

  Current methods for asymmetric alpha-arylation require blocking groups to prevent reaction at the alpha'-carbon, basic conditions that promote racemization, or multistep synthesis. This work records the first catalytic enantioselective examples of the diazoalkane-carbonyl homologation reaction. Medium ring 2-aryl ketones are prepared in one step in up to 98:2 er and 99% yield from the unsubstituted lower homologue by Sc-catalyzed aryldiazomethyl insertion with simple bis- and tris(oxazoline) ligands.

  DOI：

  10.1021/ol200402m

文献信息

• Highly Efficient and Enantioselective α-Arylation of Cycloalkanones by Scandium-Catalyzed Diazoalkane-Carbonyl Homologation
  作者：Jason Kingsbury、Victor Rendina、Hilan Kaplan

  DOI：10.1055/s-0031-1289650

  日期：2012.3

  Functionalized α-tertiary and -quaternary 2-arylcycloalkanones are rapidly accessed by scandium(III) triflate-catalyzed diazo­alkane-carbonyl homologations. Recent developments have allowed for carbon insertion reactions to be performed with catalyst loadings as low as 0.5 mol% on scales up to 5 mmol. Pairing readily available bis- and tris(oxazoline) based ligands with scandium triflate allows access to arylated medium ring carbocycles with enantioselectivities up to 98:2 er and >98% yield. The formal C-C insertion of aryldiazo­methanes into unsubstituted cycloalkanones provides a single-step solution to the ongoing challenge of α-arylation.

  功能化的α-叔和α-季2-芳基环烷酮通过三氟甲磺酸钪(III)催化的重氮甲烷-羰基同系化反应迅速获得。最近的进展使得碳插入反应能够在催化剂负载量低至0.5 mol%的情况下进行，规模可达5 mmol。结合易于获得的基于双和三噁唑啉的配体与三氟甲磺酸钪，可以合成具有高达98:2 对映体比和>98%产率的芳基化中环碳环。芳基重氮甲烷在无取代环烷酮中的正式C-C插入提供了一种一步解决α-芳基化持续挑战的方法。
• Base mediated 1,3-dipolar cycloaddition of α-substituted vinyl phosphonates with diazo compounds for synthesis of 3-pyrazolylphosphonates and 5-pyrazolcarboxylates
  作者：Nataliya S. Goulioukina、Nikolay N. Makukhin、Egor D. Shinkarev、Yuri K. Grishin、Vitaly A. Roznyatovsky、Irina P. Beletskaya

  DOI：10.1039/c6ob01780k

  日期：——

  5-Aryl-substituted pyrazol-3-ylphosphonates have been conveniently synthesized by 1,3-dipolar cycloaddition of 1-formamidovinylphosphonates and aryldiazomethanes under K2CO3/MeOH conditions at room temperature. These pyrazoles are formed in one pot via spontaneous elimination of formamide. Basic conditions prevent competitive formation of cyclopropylphosphonates. 3-Aryl substituted pyrazol-5-carboxylates

  通过在室温下在K 2 CO 3 / MeOH条件下将1-甲酰胺基乙烯基膦酸酯和芳基重氮甲烷进行1，3-偶极环加成，可以方便地合成5-芳基取代的吡唑-3-基膦酸酯。这些吡唑是通过自发消除甲酰胺而在一锅中形成的。碱性条件阻止竞争性形成环丙基膦酸酯。3-芳基取代的吡唑-5-羧酸酯可以通过相同的方法由1-芳基乙烯基膦酸酯和重氮乙酸乙酯合成，尽管为了确保芳构化阶段成功且消除二乙氧基磷酰基部分是必需的，更强的碱NaH是必需的。
• Catalytic Diazoalkane-Carbonyl Homologation: Synthesis of 2,2-Diphenylcycloheptanone and Other Quaternary or Tertiary Arylalkanones and Spirocycles by Ring Expansion
  作者：Jason S. Kingsbury

  DOI：10.15227/orgsyn.098.0343

  日期：——
• An Enantioselective Synthesis of 2-Aryl Cycloalkanones by Sc-Catalyzed Carbon Insertion
  作者：Victor L. Rendina、David C. Moebius、Jason S. Kingsbury

  DOI：10.1021/ol200402m

  日期：2011.4.15

  Current methods for asymmetric alpha-arylation require blocking groups to prevent reaction at the alpha'-carbon, basic conditions that promote racemization, or multistep synthesis. This work records the first catalytic enantioselective examples of the diazoalkane-carbonyl homologation reaction. Medium ring 2-aryl ketones are prepared in one step in up to 98:2 er and 99% yield from the unsubstituted lower homologue by Sc-catalyzed aryldiazomethyl insertion with simple bis- and tris(oxazoline) ligands.
• Titration of Nonstabilized Diazoalkane Solutions by Fluorine NMR
  作者：Victor L. Rendina、Jason S. Kingsbury

  DOI：10.1021/jo202214e

  日期：2012.1.20

  A new protocol for titrating nonstabilized diazoalkane solutions by quantitative 19F NMR is reported. An excess of 2-fluorobenzoic acid dissolved in CDCl3 is treated with the diazoalkane solution at a low temperature, immediately forming the corresponding 2-fluorobenzoate ester upon warming. A significant difference in the 19F chemical shift between the ester and acid is seen, allowing facile and accurate

  报道了通过定量19 F NMR滴定不稳定的重氮烷溶液的新方案。用重氮烷溶液在低温下处理溶解在CDCl 3中的过量的2-氟苯甲酸，在加热后立即形成相应的2-氟苯甲酸酯。观察到酯和酸之间在19 F化学位移方面存在显着差异，从而可以轻松，准确地积分来确定滴度。该过程安全，快速，并且可以高精度指示活性重氮烷浓度。