1-(2,3-dimethoxyphenyl)but-3-yn-1-ol

• 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-(2,3-dimethoxyphenyl)but-3-yn-1-ol
• 化学式: C₁₂H₁₄O₃
• 分子量: 206.241
• InChiKey: GMBXHYNPNCCSOA-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.6
• 重原子数：
  15
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  38.7
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  1-(2,3-dimethoxyphenyl)but-3-yn-1-ol 在 三乙基硅烷 、 三氟化硼乙醚 作用下， 以 二氯甲烷 为溶剂， 反应 5.0h， 以53%的产率得到1-(but-3-ynyl)-2,3-dimethoxybenzene
  参考文献：
  名称：

  Superoxide mediated isomerization of 4-aryl-but-1-ynes to 1-aryl-1,3-butadienes

  摘要：

  A new role of superoxide ion in the isomerization of homobenzylic acetylenes leading to 1-aryl-1,3-butadienes is reported. The unconventional reagent 1(02 is found to be superior in performing this kind of isomerization over other the commonly used bases. For substrates containing arene moiety and triple bond connected through more than two methylene groups, and for propargylcyclohexanol the reagent selectively effected migration of the triple bond. Reactivity of 1(02 towards the substrates having disubstitution at benzylic position varied depending on the nature of the substitution, alkyl-substitution lead to isomerization to give mixture of allene (an intermediate in the isomerization of acetylene to 1,3-butadiene) and triple bond migration product; whereas phenyl-substituted compound gave 1,3-diene. The utility of the methodology was demonstrated through a Diels-Alder reaction of one of the dienes obtained by the isomerization with suitable dienophiles. (C) 2015 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2015.07.075
• 作为产物：
  描述：

  3-溴丙炔 、 2,3-二甲氧基苯甲醛 在 锌 作用下， 以 四氢呋喃 为溶剂， 反应 1.0h， 以90%的产率得到1-(2,3-dimethoxyphenyl)but-3-yn-1-ol
  参考文献：
  名称：

  Superoxide mediated isomerization of 4-aryl-but-1-ynes to 1-aryl-1,3-butadienes

  摘要：

  A new role of superoxide ion in the isomerization of homobenzylic acetylenes leading to 1-aryl-1,3-butadienes is reported. The unconventional reagent 1(02 is found to be superior in performing this kind of isomerization over other the commonly used bases. For substrates containing arene moiety and triple bond connected through more than two methylene groups, and for propargylcyclohexanol the reagent selectively effected migration of the triple bond. Reactivity of 1(02 towards the substrates having disubstitution at benzylic position varied depending on the nature of the substitution, alkyl-substitution lead to isomerization to give mixture of allene (an intermediate in the isomerization of acetylene to 1,3-butadiene) and triple bond migration product; whereas phenyl-substituted compound gave 1,3-diene. The utility of the methodology was demonstrated through a Diels-Alder reaction of one of the dienes obtained by the isomerization with suitable dienophiles. (C) 2015 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2015.07.075

文献信息

• Regioselective propargylation of aldehydes using potassium allenyltrifluoroborate promoted by tonsil
  作者：Jucleiton J.R. Freitas、Tulio R. Couto、Italo H. Cavalcanti、Juliano C.R. Freitas、Queila P.S. Barbosa、Roberta A. Oliveira

  DOI：10.1016/j.tetlet.2016.01.017

  日期：2016.2

  The propargylation of aldehydes using potassium allenyltrifluoroborate promoted by tonsil, an inexpensive and readily available clay, in a chemo- and regioselective way is described. The method is simple and avoids the use of air and moisture sensitive organometallics and products were obtained in good to moderate yields. (C) 2016 Elsevier Ltd. All rights reserved.