4-(1,2-dimethyl-1H-imidazol-5-yl)isoquinoline | 1201005-84-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 异喹啉及其衍生物
• 英文名称: 4-(1,2-dimethyl-1H-imidazol-5-yl)isoquinoline
• 英文别名: 5-(4-isoquinolyl)-1,2-dimethylimidazole
• CAS: 1201005-84-6
• 化学式: C₁₄H₁₃N₃
• 分子量: 223.277
• InChiKey: XSRJWNHQXCPWEF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.94
• 重原子数：
  17.0
• 可旋转键数：
  1.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.14
• 拓扑面积：
  30.71
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为产物：
  描述：

  1,2-二甲基咪唑 、 4-溴异喹啉 在 {N,N-(1,2-diphenylethane-1,2-diylidene)bis(2-benzhydryl-4,6-dimthylaniline)}dichloropalladium 、 potassium carbonate 、 三甲基乙酸 作用下， 以 N,N-二甲基乙酰胺 为溶剂， 反应 12.0h， 以95%的产率得到4-(1,2-dimethyl-1H-imidazol-5-yl)isoquinoline
  参考文献：
  名称：

  庞大的α-二亚胺钯配合物：在好氧条件下对杂芳烃直接进行C–H键芳基化反应非常有效†

  摘要：

  通过增强主链和N-芳基部分的体积的策略，我们设计并合成了一种体积较大的α-二亚胺钯配合物（即{[Ar–N C（R）–C（R）N– Ar] PdCl 2，（Ar ＝ 2-苯甲酰基-4，6-二甲基苯基）}，C1，R ＝ H；C2，R ＝ An；C3，R ＝ Ph）。这些钯配合物的结构已得到很好的表征，而C1和C3则通过X射线衍射进一步表征。对杂芳烃的直接CH键芳构化筛选了预催化剂的催化性能。二齿N，N-钯络合物C3与两个主链和ñ -芳基膨松性被发现是在有氧条件下高效率的预催化剂。钯负载量低至0.5-0.1 mol％，各种具有挑战性的庞大的空间芳基溴化物和杂芳基溴化物的杂芳烃都适用于这种交叉偶联反应。

  DOI：

  10.1039/c6dt02544g

文献信息

• Phosphine-free palladium-catalysed direct 5-arylation of imidazole derivatives at low catalyst loading
  作者：Julien Roger、Henri Doucet

  DOI：10.1016/j.tet.2009.09.084

  日期：2009.11

  The regioselective 5-arylation of imidazole derivatives with aryl bromides using a low loading of a phosphine-free palladium catalyst gives a simple and economic access to the corresponding 5-arylimidazoles. The choice of the base and of the solvent was found to be crucial to form these products in high yields. Using KOAc as the base, DMAc as the solvent and only 0.5–0.01 mol % Pd(OAc)2 as the catalyst

  使用低负荷的无膦钯催化剂，将咪唑衍生物与芳基溴进行区域选择性的5-芳基化，可简单而经济地获得相应的5-芳基咪唑。发现碱和溶剂的选择对于以高收率形成这些产物是至关重要的。使用KOAc作为碱，使用DMAc作为溶剂，仅使用0.5-0.01 mol％Pd（OAc）2作为催化剂，可以以中等到良好的收率得到目标产物，并带有多种芳基溴化物。芳基溴上的取代基如氟，三氟甲基，甲酰基，乙酰基，丙酰基，酯或腈是可以接受的。也可以使用立体上稠合的芳基溴化物或杂芳基溴化物。咪唑衍生物上取代基的性质对产率有重要影响。
• Developing Bis(imino)acenaphthene-Supported <i>N</i>-Heterocyclic Carbene Palladium Precatalysts for Direct Arylation of Azoles
  作者：Li-Qun Hu、Rong-Li Deng、Yan-Fen Li、Cui-Jin Zeng、Dong-Sheng Shen、Feng-Shou Liu

  DOI：10.1021/acs.organomet.7b00784

  日期：2018.1.22

  On the basis of the strategy of developing highly efficient protocol for Pd-catalyzed cross-coupling reactions, a series of bulky bis(imino)acenaphthene (BIAN)-supported Pd-PEPPSI complexes were synthesized, characterized, and applied in direct arylation of azoles. The effect of backbone and N-moieties on NHCs was evaluated, and the reaction conditions were optimized. It was found that the bulky Pd-PEPPSI complexes could be successfully employed in cross-coupling of (hetero)aryl bromides with azoles at a low palladium loading of 0.5-0.05 mol % under aerobic conditions, demonstrating the ease of manipulation without glovebox and handling of solvents.
• Sterically Encumbered Tetraarylimidazolium Carbene Pd-PEPPSI Complexes: Highly Efficient Direct Arylation of Imidazoles with Aryl Bromides under Aerobic Conditions
  作者：Xu-Xian He、Yinwu Li、Bei-Bei Ma、Zhuofeng Ke、Feng-Shou Liu

  DOI：10.1021/acs.organomet.6b00391

  日期：2016.8.22

  A series of sterically encumbered tetraarylimidazolium carbene Pd-PEPPSI complexes were conveniently prepared and fully characterized. These sterically encumbered Pd-PEPPSI complexes act as active precatalysts for the direct arylation of imidazoles with aryl bromides under aerobic conditions. The catalytic performance of Pd-PEPPSI complexes in cross-coupling processes is investigated. Under the optimal protocols, the cross-coupling reactions regioselectively produced C5-arylation products in moderate to excellent yields, which could tolerate a wide range of functional aryl bromides.