2',4',6'-tri-tert-butylstyrene | 33241-82-6

• 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: 2',4',6'-tri-tert-butylstyrene
• 英文别名: 2,4,6-tri-t-butylstyrene；2,4,6-Tri-tert.-butyl-styrol；2,4,6-Tri-tert-butylstyren；1,3,5-Tritert-butyl-2-ethenylbenzene
• CAS: 33241-82-6
• 化学式: C₂₀H₃₂
• 分子量: 272.474
• InChiKey: JPGUJEROMFVCJR-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.7
• 重原子数：
  20
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.6
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为产物：
  描述：

  1-溴-2,4,6-三叔丁基苯 在 吡啶 、 copper(l) iodide 、 正丁基锂 、 氯化亚砜 、 氢溴酸 、 叔丁基锂 作用下， 以 四氢呋喃 、 乙醚 、 正己烷 、 甲基叔丁基醚 、 氯仿 、 水 、 正戊烷 为溶剂， 反应 22.42h， 生成 2',4',6'-tri-tert-butylstyrene 、 [1-(2',4',6'-tri-tert-butylphenyl)vinyl](trimethyl)-stannane
  参考文献：
  名称：

  Highly syn selective addition of aqueous HBr to hydrophobically shielded arylalkynes

  摘要：

  Hydrophobically shielded alkynes HC C-aryl, carrying 2,6-di- and 2,4,6-tri-tert-butylphenyl as the aryl group, can add aqueous HBr on heating in moist chloroform solutions to produce pure H2C=C(-Br)-aryl (isolated yields 96%, no hydrolysis). Employment of DC C-aryl furnished initially only the E stereoisomer of DHC=C(-Br)-aryl (stereospecific syn addition), which was slowly both dedeuteriated and partially transformed to the Z stereoisomer by HBr. The strongly retarded HBr addition to H3C-C C-aryl in moist chloroform produced again more E than Z product, whereas a thermodynamic E/Z ratio of 10:87 was found in moist acetic acid. Substitution of Br by LiSnMe3 produced H2C=C(-SnMe3)-aryl with well resolved long range Sn-119 NMR coupling constants. (C) 2014 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2014.05.002

文献信息

• Reactions of (2,4,6-Tri-<i>t</i>-butyl)thiobenzaldehyde with Diazo Compounds. Synthesis and Reactions of Sterically Congested Thiiranes
  作者：Soichiro Watanabe、Takayuki Kawashima、Norihiro Tokitoh、Renji Okazaki

  DOI：10.1246/bcsj.68.1437

  日期：1995.5

  several products containing 2,4,6-tri-t-butylbenzo[b]thiophene and Dewar benzenes, 2,2-di-t-butyl-3-(3,4,6-tri-t-butylbicyclo[2.2.0]hexa-2,5-dien-2-yl)thiirane and 2-t-butyl-3,3-dimethyl-1-(1,3,5-tri-t-butylbicyclo[2.2.0]hexa-2,5-diene-2-yl)-1-butene (24), the latter of which is the first example for a vinyl-substituted Dewar benzene. Compound 24 has a unique reactivity, giving a rearrangement product

  通过（2,4,6-三叔丁基）硫代苯甲醛与位阻重氮化合物的反应合成了具有 2,4,6-三叔丁基苯基的空间拥挤硫杂丙烷。最拥挤的硫杂丙环，2,2-二叔丁基-3-(2,4,6-三叔丁基苯基)硫杂丙环 (15c) 的热脱硫即使使用高反应性试剂，如六甲基磷酰胺或有机锂。15c的光反应没有得到相应的苯乙烯，但得到了几种含有2,4,6-三叔丁基苯并[b]噻吩和杜瓦苯、2,2-二叔丁基-3-( 3,4,6-三-叔丁基双环[2.2.0]六-2,5-二烯-2-基)硫杂丙环和2-叔丁基-3,3-二甲基-1-(1,3,5 -三叔丁基双环[2.2.0]六-2,5-二烯-2-基)-1-丁烯(24)，后者是乙烯基取代的杜瓦苯的第一个例子。
• Highly syn selective addition of aqueous HBr to hydrophobically shielded arylalkynes
  作者：Rudolf Knorr、Eva C. Rossmann、Monika Knittl、Petra Böhrer

  DOI：10.1016/j.tet.2014.05.002

  日期：2014.8

  Hydrophobically shielded alkynes HC C-aryl, carrying 2,6-di- and 2,4,6-tri-tert-butylphenyl as the aryl group, can add aqueous HBr on heating in moist chloroform solutions to produce pure H2C=C(-Br)-aryl (isolated yields 96%, no hydrolysis). Employment of DC C-aryl furnished initially only the E stereoisomer of DHC=C(-Br)-aryl (stereospecific syn addition), which was slowly both dedeuteriated and partially transformed to the Z stereoisomer by HBr. The strongly retarded HBr addition to H3C-C C-aryl in moist chloroform produced again more E than Z product, whereas a thermodynamic E/Z ratio of 10:87 was found in moist acetic acid. Substitution of Br by LiSnMe3 produced H2C=C(-SnMe3)-aryl with well resolved long range Sn-119 NMR coupling constants. (C) 2014 Elsevier Ltd. All rights reserved.