2-(cyclohexenylethynyl)-4,6-dimethoxypyrimidine | 1418137-10-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-(cyclohexenylethynyl)-4,6-dimethoxypyrimidine
• 英文别名: 2-[2-(Cyclohexen-1-yl)ethynyl]-4,6-dimethoxypyrimidine；2-[2-(cyclohexen-1-yl)ethynyl]-4,6-dimethoxypyrimidine
• CAS: 1418137-10-6
• 化学式: C₁₄H₁₆N₂O₂
• 分子量: 244.293
• InChiKey: DEFYYKHYSLHSPN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3
• 重原子数：
  18
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  44.2
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  1-乙炔基环己烷 、 2-氯-4,6-二甲氧基嘧啶 在 potassium phosphate 、 Pd(Cy*Phine)2Cl2 作用下， 以 乙腈 为溶剂， 反应 6.0h， 以75%的产率得到2-(cyclohexenylethynyl)-4,6-dimethoxypyrimidine
  参考文献：
  名称：

  含间-三芳基膦配体的钯预催化剂，可方便地实现无铜Sonogashira交叉偶联反应†

  摘要：

  利用演化的间-叔芳基膦配体Cy * Phine的不同变异，开发了三种新颖的钯配合物。这些空气和水分稳定的配合物PdCl 2 L 2（L = Cy * Phine，Cy * Phine-CF 3和Cy * Phine- n Bu）在无铜Sonogashira中表现出优异的广泛性能和操作简便性具有挑战性的（杂）芳基氯化物和末端炔烃的交叉偶联。当引入更多的供电子取代基时，对配体支架外围的修饰显示出反应速率的适度提高，这暗示了未来潜在的设计升级。

  DOI：

  10.1039/c5cy00507h

文献信息

• Heck Alkynylation (Copper-Free Sonogashira Coupling) of Aryl and Heteroaryl Chlorides, Using Pd Complexes of <i>t</i>-Bu₂(<i>p</i>-NMe₂C₆H₄)P: Understanding the Structure–Activity Relationships and Copper Effects
  作者：Xiaotao Pu、Hongbo Li、Thomas J. Colacot

  DOI：10.1021/jo302195y

  日期：2013.1.18

  L2Pd(0) and L2Pd(II) complexes, where L=t-Bu-2(p-NMe2C6H4)P, have been identified as efficient catalyst systems for the Heck alkynylation of a variety of aryl bromides (17 examples) and aryl/heteroaryl chlorides (31 examples) with a range of aryl- and alkyl-acetylenes in excellent yields, under relatively low Pd loadings. The single-crystal X-ray structure determination of the presumably active catalytic species, L2Pd(0), was carried out in this study to better understand the superior activity of the current catalyst system from a structure activity relationship point of view. The P-Pd-P bond angle indicates that the complex is bent (174.7 degrees) in comparison to the perfectly linear (180.0 degrees) structure of the analogous Pd(t-Bu3P)(2). Preliminary mechanistic studies on the negative copper effect and substrate effect of aryl acetylenes were conducted to better understand the cross-coupling pathway of Heck alkynylation.
• Palladium precatalysts containing meta-terarylphosphine ligands for expedient copper-free Sonogashira cross-coupling reactions
  作者：Yong Yang、Joyce Fen Yan Lim、Xinying Chew、Edward G. Robins、Charles W. Johannes、Yee Hwee Lim、Howard Jong

  DOI：10.1039/c5cy00507h

  日期：——

  and Cy*Phine-nBu), demonstrated exceptional broad-based performance and operational simplicity in the copper-free Sonogashira cross-coupling of challenging (hetero-)aryl chlorides and terminal alkynes. Modifications to the periphery of the ligand scaffold showed modest improvements in the reaction rate when more electron-donating substituents were incorporated, which hints at potential design upgrades

  利用演化的间-叔芳基膦配体Cy * Phine的不同变异，开发了三种新颖的钯配合物。这些空气和水分稳定的配合物PdCl 2 L 2（L = Cy * Phine，Cy * Phine-CF 3和Cy * Phine- n Bu）在无铜Sonogashira中表现出优异的广泛性能和操作简便性具有挑战性的（杂）芳基氯化物和末端炔烃的交叉偶联。当引入更多的供电子取代基时，对配体支架外围的修饰显示出反应速率的适度提高，这暗示了未来潜在的设计升级。