Efficient copper-catalyzedtrifluoromethylation of aromatic iodides was achieved with TMSCF3 in the presence of trimethylborate. The Lewis acid was used to anchor the in situ generated trifluoromethyl anion and suppress its rapid decomposition. Broad applicability of the new trifluoromethylating reaction was demonstrated in the functionalization of different aromatic and heteroaromatic iodides.
preparation of N‐heterocycles by different routes. For instance, the Cu‐HMOP efficiently catalyzes one‐pot sequential multi‐step oxidative dehydrogenative coupling of 2‐aminobenzyl alcohol with diverse aromatic ketones to afford corresponding quinolines in excellent isolated yields (up to 97 %). Secondly, the present catalyst exhibits good aerobic oxidative dehydrogenation activity of amines to imines
在绿色化学的背景下,使用非贵金属从可再生资源合成N杂环的非均相催化在经济和环境方面引起了极大的兴趣。本文中,我们提出了一种具有纳米棒形貌的三嗪功能分级介孔有机聚合物(HMOP),以及较大的BET表面积〜1218 m 2 g -1,巨大的孔体积和γτ“; 6 mL g -1和双重微/介孔架构。随后的HMOP与氮原子的Cu配位提供了一种强大的催化剂(Cu-HMOP),可完成通过不同途径制备N-杂环的多步级联反应。例如,Cu-HMOP有效催化2-氨基苄醇与各种芳族酮的一锅顺序多步氧化脱氢偶联反应,从而以优异的分离产率(高达97%)提供相应的喹啉。其次,本发明的催化剂表现出胺对亚胺的良好的好氧氧化脱氢活性。第三,对于涉及叠氮化物-炔烃的“点击”反应,Cu-HMOP在室温下以水为溶剂,可定量获得1,4-二取代的1,2,3-三唑衍生物。
Synthesis and Crystal Structures of Coordination Complexes Containing Cu<sub>2</sub>I<sub>2</sub>Units and Their Application in Luminescence and Catalysis
作者:Huaixia Zhao、Xinxiong Li、Jinyun Wang、Liuyi Li、Ruihu Wang
DOI:10.1002/cplu.201300249
日期:2013.12
nitrogen-containing ligands (L1-L5) with CuI gave rise to five coordinationcomplexes consisting of Cu2 I2 dimeric units. L1 in complex 1 adopts a cis conformation and links Cu2 I2 into a dinuclear structure. L2 and L3 in complexes 2 and 3 exhibit a trans conformation, and the alternative linkage of L2 or L3 and Cu2 I2 results in the formation of a 1D chain. In complex 4, two pyrazolyl-pyridine units of L4 at the same
双或三螯合含氮配体(L1-L5)与CuI的反应产生了五个由Cu2 I2二聚体单元组成的配位络合物。配合物1中的L1采用顺式构象并将Cu2I2连接成双核结构。配合物2和3中的L2和L3表现出反式构象,L2或L3与Cu2 I2的交替连接导致形成一维链。在络合物4中,在中心苯环的同一侧的L4的两个吡唑基-吡啶单元连接至形成四核大环的Cu 2 I 2,并且在中心苯环的另一侧的第三个吡唑基-吡啶单元进一步连接该大环进入一维链 L5以顺式构象桥接Cu2 I2,形成四核复合物,由于吡唑基和三唑基环之间的电子性质不同,因此它与1有很大的不同。L1和L5中两对邻位含氮螯合环中的配位氮原子分别指向相反和相同的方向。包含吡唑基-吡啶单元的配合物1-4显示发光,而在包含三唑基-吡啶单元的配合物5中没有观察到清晰的发射,尽管在相同条件下对其进行了研究。初步评价了配合物1-5在铜(I)催化的Ullmann交叉偶联反应
Azide–alkyne cycloaddition reactions in water <i>via</i> recyclable heterogeneous Cu catalysts: reverse phase silica gel and thermoresponsive hydrogels
Functionalized reverse phase silicagel and thermoresponsive hydrogels were synthesized as heterogeneous catalysts supports. Cu(I) and Cu(II) catalysts immobilized onto two types of supports were prepared and characterized. The copper catalyzed azide–alkyne cycloaddition was performed in water via a one-pot reaction and yielded good results. These catalysts are air stable and reusable over multiple
合成了功能化的反相硅胶和热响应水凝胶作为非均相催化剂载体。制备并表征了固定在两种载体上的Cu( I ) 和 Cu( II ) 催化剂。铜催化的叠氮化物-炔烃环加成反应在水中通过一锅反应进行,并产生了良好的结果。这些催化剂对空气稳定且可多次使用。
A theophylline based copper N-heterocyclic carbene complex: synthesis and activity studies in green media