1-(2-bromo-1,1-dimethoxyethyl)-4-trifluoromethylbenzene

• 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-(2-bromo-1,1-dimethoxyethyl)-4-trifluoromethylbenzene
• 英文别名: alpha-Bromo-4'-(trifluoromethyl)acetophenone dimethyl acetal；1-(2-bromo-1,1-dimethoxyethyl)-4-(trifluoromethyl)benzene
• 化学式: C₁₁H₁₂BrF₃O₂
• 分子量: 313.114
• InChiKey: VEJJHDKYGZYHEE-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3
• 重原子数：
  17
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  甲醇 、 对三氟甲基苯甲醛 在 哌啶 、 1,3-二溴-5,5-二甲基海因 作用下， 反应 12.0h， 以70%的产率得到1-(2-bromo-1,1-dimethoxyethyl)-4-trifluoromethylbenzene
  参考文献：
  名称：

  One-Step Conversion of Acetophenones to α-Haloacetophenone Dimethyl Acetals Using DCDMH/DBDMH and Molecular Sieve in Methanol

  摘要：

  Using DCDMH/DBDMH as N-halo reagent, piperidine as catalyst, and 4-A molecular sieve as water-removing agent, alpha-haloacetophenone dimethyl acetals were directly obtained from the solvent of methanol. As to the substrates with electron-withdrawing groups, the conversions were 80-100%.

  DOI：

  10.1080/00397911.2010.540696

文献信息

• [EN] PROCESS FOR PRODUCING TRIFLUOROMETHYL-SUBSTITUTED 2-ALKOXYACETOPHENONE DERIVATIVES<br/>[FR] PROCEDE DE PRODUCTION DE DERIVES DE 2-ALCOXYACETOPHENONE TRIFLUOROMETHYLE-SUBSTITUEE
  申请人：CENTRAL GLASS CO LTD

  公开号：WO2004014887A1

  公开（公告）日：2004-02-19

  A process for producing a brominated acetal (represented by the formula 3) includes (a) brominating a trifluoromethyl-substituted acetophenone by Br2 in the presence of an alkylene diol. It is optional to produce a trifluoromethyl-substituted 2-alkoxyacetophenone derivative (represented by the formula 9) by (b) reacting the brominated acetal with a metal alkoxide, thereby converting the brominated acetal into an ether; and (c) hydrolyzing the ether in the presence of an acid catalyst to remove an acetal group from the ether, thereby producing the 2-alkoxyacetophenone derivative. Alternatively, the 2-alkoxyacetophenone can be produced by (a) reacting a trifluoromethyl-substituted phenacyl halide with an acetalization agent, thereby converting the phenacyl halide into an acetal; (b) reacting the acetal with a metal alkoxide, thereby converting the acetal into an ether; and (c) hydrolyzing the ether in the presence of an acid catalyst to remove the acetal group from the ether.

  生产溴代缩醛（化学式3）的过程包括：（a）在烷基二醇存在下，用Br2对三氟甲基取代的乙酰苯甲酮进行溴化。可以通过以下步骤制备三氟甲基取代的2-烷氧基乙酰苯甲酮衍生物（化学式9）：（b）将溴代缩醛与金属烷氧化物反应，将溴代缩醛转化为醚；（c）在酸催化剂存在下水解醚，从而从醚中去除缩醛基，从而制备2-烷氧基乙酰苯甲酮衍生物。或者，可以通过以下步骤制备2-烷氧基乙酰苯甲酮：（a）将三氟甲基取代的苯甲酰卤与缩醛化试剂反应，将苯甲酰卤转化为缩醛；（b）将缩醛与金属烷氧化物反应，将缩醛转化为醚；（c）在酸催化剂存在下水解醚，从而从醚中去除缩醛基。
• One-Step Conversion of Acetophenones to <font>α</font>-Haloacetophenone Dimethyl Acetals Using DCDMH/DBDMH and Molecular Sieve in Methanol
  作者：Bin Zhou、Zizhan Chen、Zubiao Zheng、Bingbing Han、Xinzhuo Zou

  DOI：10.1080/00397911.2010.540696

  日期：2012.5.15

  Using DCDMH/DBDMH as N-halo reagent, piperidine as catalyst, and 4-A molecular sieve as water-removing agent, alpha-haloacetophenone dimethyl acetals were directly obtained from the solvent of methanol. As to the substrates with electron-withdrawing groups, the conversions were 80-100%.