(Z)-β-bromo-4-(N,N-dimethylamino)styrene | 156780-40-4

• 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: (Z)-β-bromo-4-(N,N-dimethylamino)styrene
• 英文别名: 4-[(Z)-2-bromoethenyl]-N,N-dimethylaniline
• CAS: 156780-40-4
• 化学式: C₁₀H₁₂BrN
• 分子量: 226.116
• InChiKey: UBHUZTDZYCCKLP-FPLPWBNLSA-N

物化性质

• 熔点：
  49-50 °C(Solv: hexane (110-54-3))
• 沸点：
  306.1±25.0 °C(Predicted)
• 密度：
  1.369±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  12
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  3.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  (Z)-β-bromo-4-(N,N-dimethylamino)styrene 在 正丁基锂 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 1.0h， 以38%的产率得到4-二甲基氨基苯乙炔
  参考文献：
  名称：

  制备对二烷基氨基苯基乙炔的简便方法

  摘要：

  报道了两种制备对二烷基氨基苯乙炔的简便方法： a) 将二烷基氨基取代的肉桂酸在乙酸中而不是氯仿中容易地获得的溴化化合物脱溴化氢；b) 由对二甲氨基苯甲醛与氯亚甲基三苯基正膦反应得到的 2-氯苯乙烯衍生物的脱氯化氢。

  DOI：

  10.1246/bcsj.56.361
• 作为产物：
  描述：

  4-二甲基氨基肉桂酸 在 溴 、 sodium carbonate 、 溶剂黄146 作用下， 以 水 为溶剂， 反应 1.0h， 生成 (Z)-β-bromo-4-(N,N-dimethylamino)styrene
  参考文献：
  名称：

  制备对二烷基氨基苯基乙炔的简便方法

  摘要：

  报道了两种制备对二烷基氨基苯乙炔的简便方法： a) 将二烷基氨基取代的肉桂酸在乙酸中而不是氯仿中容易地获得的溴化化合物脱溴化氢；b) 由对二甲氨基苯甲醛与氯亚甲基三苯基正膦反应得到的 2-氯苯乙烯衍生物的脱氯化氢。

  DOI：

  10.1246/bcsj.56.361

文献信息

• A new synthesis of π-electron conjugated phosphonates and phosphonic bis(diethylamides) and their SHG activities
  作者：Takuji Ogawa、Naoya Usuki、Noboru Ono

  DOI：10.1039/a709082j

  日期：——

  A series of vinylic and arylic phosphonates and phosphonic bis(diethylamides) were prepared by copper promoted substitution of the corresponding bromides. These π-electron conjugated phosphonates and phosphonic bis(diethylamides) were investigated to elucidate their optical and second harmonic generation (SHG) properties; it was found that diphenyl 2-(4-dimethylaminophenyl)ethenylphosphonate exhibited strong SHG activity, the efficiency being 13 times greater than that of urea.

  通过铜催化的相应溴化物的取代反应，制备了一系列乙烯基和芳基膦酸盐及双（二乙基酰胺）膦酸。研究了这些共轭的磷酸盐和双（二乙基酰胺）膦酸的光学性质和二次谐波产生（SHG）特性；发现二苯基2-（4-二甲氨基苯基）乙烯基膦酸盐具有强烈的SHG活性，效率比尿素高13倍。
• A general and convenient synthetic method of geometrically pure (Z)-1-bromo-1-alkenes
  作者：Jun'ichi Uenishi、Reiko Kawahama、Yasuhiko Shiga、Osamu Yonemitsu、Jiro Tsuji

  DOI：10.1016/s0040-4039(96)01461-x

  日期：1996.9

  Palladium catalyzed hydrogenolysis of 1,1-dibromo-1-alkenes by tributyltin hydride proceeds smoothly to give (Z)-1-bromo-1-alkenes with excellent stereoselectivity in good yields. Dibromomethylenation of aldehydes by a combination of CBr4 and Ph3P in methylene chloride and the successive hydrogenolysis affords (Z)-1-bromo-1-alkenes in one-pot.

  氢化三丁基锡对钯催化的1,1-二溴-1-烯烃的氢解反应进行得很顺利，从而以良好的收率获得了具有出色立体选择性的（Z）-1-溴-1-烯烃。通过在二氯甲烷中将CBr 4和Ph 3 P组合进行醛的二溴甲基化，然后连续进行氢解，一锅得到（Z）-1-溴-1-烯烃。
• Stereoselective Hydrogenolysis of 1,1-Dibromo-1-alkenes and Stereospecific Synthesis of Conjugated (<i>Z</i>)-Alkenyl Compounds
  作者：Jun'ichi Uenishi、Reiko Kawahama、Osamu Yonemitsu、Jiro Tsuji

  DOI：10.1021/jo9812781

  日期：1998.11.1

  The Pd-catalyzed hydrogenolysis of 1,1-dibromoalkenes with Bu3SnH occurs at room temperature stereoselectively to give (Z)-1-bromo-1-alkenes. We sought to determine the optimal reaction conditions and illustrate the scope of this method with 32 dibromoalkenes including alkenyl- and alkynyl-conjugated 1,l-dibromo-l-alkenes 7a-h and 2,2-disubstituted I,1-dibromo-1-alkenes 9a-f. Triphenylphosphine was the best ligand for the Pd-catalyzed hydrogenolysis. A wide range of solvents can be used for this reaction excluding EtOH, AcOH, and CHCl3. However, the reaction proceeds even in these solvents with the addition of a cosolvent or radical scavenger. The reaction of 1,1-diiodo-1-alkene (3) gave a mixture of (Z)-1-iodo-1-alkene (4), (Z)-1-tributylstannyl-1-alkene (5), and a terminal alkene 6, while that of 1,1-dichloroalkene did not occur. This selectivity can be explained by the stereoselective insertion of Pd(0) to a trans bromine-alkenyl carbon bond, successive transmetalation with Bu3SnH, and reductive elimination. The Suzuki and Sonogashira couplings of the resulting (Z)-1-bromo-1-alkenes with alkenyl(dialkoxy)borane and terminal alkyne occurred to give conjugated polyenes and enynes stereospecifically. The Pd-catalyzed hydrogenolysis of 1,l-dibromo-l-alkene and successive cross-coupling can be carried out either in a stepwise manner or in one-pot under the same Pd catalysis. These two processes should be useful for the synthesis of geometrically pure polyene and enyne with a Z-alkenyl unit.