Chelating Bis(1,2,3‐triazol‐5‐ylidene) Rhodium Complexes: Versatile Catalysts for Hydrosilylation Reactions
作者:Thanh V. Q. Nguyen、Woo‐Jin Yoo、Shū Kobayashi
DOI:10.1002/adsc.201500875
日期:2016.2.4
reactions. However, the substrates were mostly limited to reactive carbonyl compounds (aldehydes and ketones) or carbon‐carbon multiple bonds. Here, we describe the application of newly‐developed chelatingbis(tzNHC)‐rhodium complexes (tz=1,2,3‐triazol‐5‐ylidene) for several reductive transformations. With these catalysts, the formal reductive methylation of amines using carbon dioxide, the hydrosilylation
HAPpy catalysts: Hydroxyapatite‐supported gold nanoparticles efficiently catalyze the deoxygenation of amides, sulfoxides, and pyridine N‐oxides, with silanes as reductants, to give the corresponding products with excellent turnover numbers (see graphic). Furthermore, this catalyst is easily recovered and reused without any loss of efficiency.
Highly efficient and eco-friendly synthesis of tertiary amines by reductive alkylation of aldehydes with secondary amines over a Pt nanowires catalyst
作者:Junjie Wu、Shuanglong Lu、Danhua Ge、Hongwei Gu
DOI:10.1039/c5ra12299f
日期:——
A highly efficient and environmentally friendly method for the synthesis of tertiary amines by direct interaction of aldehydes with secondary amines was reported over a Pt NWs catalyst under mild reaction conditions.
ESI-MS spectral methods. Further, structures of two of the complexes have been determined by single crystal X-ray diffraction technique which revealed a pseudo octahedral geometry with the coordination of the quinoline nitrogen and quinoline oxygen atoms of the ligand. All the newcomplexes have been employed as efficient catalysts in N-alkylation reactions for the synthesis of tertiary amines by the coupling
一系列新的通式为[RuH(CO)(EPh 3)2 L](1-6)的8-羟基喹啉-2-羧醛的Ru(II)配合物(E = P或As,L = N '-(((8-羟基喹啉-2-基)亚甲基)噻吩-2-碳酰肼(HQ-THy),N'-(((8-羟基喹啉-2-基)亚甲基)异烟酰肼(HQ-IHy),N'-已经合成了((8-羟基喹啉-2-基)亚甲基)苯甲酰肼(HQ-BHy)。它们已通过元素分析,IR,NMR(1 H,13 C和31P)和ESI-MS光谱方法。此外,已经通过单晶X射线衍射技术确定了两种配合物的结构,该技术揭示了配体的喹啉氮和喹啉氧原子配位的伪八面体几何形状。通过将仲胺与芳族伯醇在低催化剂负载下以最大收率偶联,所有新的络合物已被用作N-烷基化反应中合成叔胺的有效催化剂。另外,已经充分研究了取代基对配体,不同溶剂以及碱和催化剂负载量对配合物催化活性的影响。综合大楼1业已发现,AlO3是醇与胺的N-烷
Iron‐Catalysed Reductive Amination of Carbonyl Derivatives with ω‐Amino Fatty Acids to Access Cyclic Amines
An efficient method for the reductive amination of carbonyl derivatives with ω‐amino fatty acids catalysed by an iron complex Fe(CO)4(IMes) [IMes=1,3‐bis(2,4,6‐trimethylphenyl)imidazol‐2‐ylidene] by means of hydrosilylation was developed. A variety of pyrrolidines, piperidines and azepanes were selectively synthesised in moderate‐to‐excellent yields (36 examples, 47–97 % isolated yield) with a good