(4R)-4-(bromomethyl)-4-methyl-2-phenyl-3,1-benzoxazine | 1392323-24-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并恶嗪类
• 英文名称: (4R)-4-(bromomethyl)-4-methyl-2-phenyl-3,1-benzoxazine
• CAS: 1392323-24-8
• 化学式: C₁₆H₁₄BrNO
• 分子量: 316.197
• InChiKey: GNHLRCXQTJHLDV-INIZCTEOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  19
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.19
• 拓扑面积：
  21.6
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  2'-acetylbenzanilide 在 3BF₄^(1-)*C₃₆H₅₈BrN₄⁽³⁺⁾ 、 (Ra)-4-hydroxy-2,6-bis(2,4,6-triisopropylphenyl)-9,14-bis(triisopropylsilyl)dinaphtho[1,3,2]dioxaphosphepine 4-oxide 、 sodium phosphate 、 sodium t-butanolate 作用下， 以 乙醚 、 正己烷 、 对二甲苯 为溶剂， 反应 4.5h， 生成 (4R)-4-(bromomethyl)-4-methyl-2-phenyl-3,1-benzoxazine
  参考文献：
  名称：

  Enantioselective Halocyclization Using Reagents Tailored for Chiral Anion Phase-Transfer Catalysis

  摘要：

  A chiral anion phase-transfer system for enantioselective halogenation is described. Highly insoluble, ionic reagents were developed as electrophilic bromine and iodine sources, and application of this system to o-anilidostyrenes afforded halogenated 4H-3,1-benzoxazines with excellent yield and enantioselectivity.

  DOI：

  10.1021/ja305795x

文献信息

• [EN] ASYMMETRIC ELECTROPHILIC FLUORINATION USING AN ANIONIC CHIRAL PHASE-TRANSFER CATALYST<br/>[FR] FLUORATION ÉLECTROPHILE ASYMÉTRIQUE UTILISANT UN CATALYSEUR DE TRANSFERT DE PHASE CHIRAL ANIONIQUE
  申请人：UNIV CALIFORNIA

  公开号：WO2013096971A1

  公开（公告）日：2013-06-27

  The discovery of distinct modes of asymmetric catalysis has the potential to rapidly advance chemists' ability to build enantioenriched molecules. As an example, the use of chiral cation salts as phase-transfer catalysts for anionic reagents has enabled a vast set of enantioselective transformations. A largely overlooked analogous mechanism wherein a chiral anionic catalyst brings a cationic species into solution is itself a powerful method. The concept is broadly applicable to a number of different reaction pathways, including to the enantioselective fluorocyclization of olefins, and dearomatization of aromatic systems with a cationic electrophile-transferring (e.g., fluorinating) agent and a chiral phosphate catalyst. The reactions proceed in high yield and stereoselectivity. The compounds and methods of the invention are of particular value, especially considering the scarcity of alternative approaches.

  发现不对称催化的不同模式具有潜力快速推动化学家构建手性富集分子的能力。例如，使用手性阳离子盐作为相转移催化剂用于阴离子试剂已经实现了大量手性选择性转化。一个被大多数人忽视的类似机制是手性阴离子催化剂将阳离子物种溶解到溶液中，这本身就是一种强大的方法。这一概念广泛适用于许多不同的反应途径，包括对烯烃进行手性选择性氟环化和用阳离子亲电试剂转移（例如，氟化）剂和手性磷酸盐催化剂进行芳香系统去芳构化。这些反应产率高，立体选择性好。该发明的化合物和方法具有特殊价值，尤其考虑到替代方法的稀缺性。
• Enantioselective Halocyclization Using Reagents Tailored for Chiral Anion Phase-Transfer Catalysis
  作者：Yi-Ming Wang、Jeffrey Wu、Christina Hoong、Vivek Rauniyar、F. Dean Toste

  DOI：10.1021/ja305795x

  日期：2012.8.8

  A chiral anion phase-transfer system for enantioselective halogenation is described. Highly insoluble, ionic reagents were developed as electrophilic bromine and iodine sources, and application of this system to o-anilidostyrenes afforded halogenated 4H-3,1-benzoxazines with excellent yield and enantioselectivity.