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
Dehydrogenative Aromatization and Sulfonylation of Pyrrolidines: Orthogonal Reactivity in Photoredox Catalysis
were established. The mild reaction conditions make this approach an appealing and versatile strategy to functionalize/oxidize pyrrolidines whereby arylsulfonyl chlorides were identified to be both catalyst regeneration and sulfonylation reagents.
hydrogen evolution ortho-aminoalkylation of phenolic derivatives with cyclic amines as the coupling agents. The developed cross-coupling reaction offers a practical platform for direct access to a variety of functionalized phenols with the features of good substrate and functional group compatibility, readily available catalyst system and feedstocks, no need for additional sacrificial oxidants, and high
A novel one-pot method has been developed for the interfacial hydrogenation of nitriles to synthesize asymmetrical tertiary amines. The active Pt NWs allow for the preparation of a series of tertiary amines in excellent yields (up to 99.0%) and a mixed solvent is vital for the adjustment of the yield. And also, the reaction proceeded under mild conditions and is environmentally friendly.
Direct Hydrosilylation of Tertiary Amides to Amines by an In Situ Formed Iron/N-Heterocyclic Carbene Catalyst
作者:Alexey Volkov、Elina Buitrago、Hans Adolfsson
DOI:10.1002/ejoc.201300010
日期:2013.4
Tertiaryamides were efficiently reduced to their corresponding tertiaryamines in high isolated yields by using the commercially available and inexpensive polymeric silane polymethylhydrosiloxane (PMHS) as the reducing agent. The reaction is efficiently catalyzed by an in situ generated iron/N-heterocycliccarbene complex (1 mol-%) obtained from iron(II) acetate and 1-(2-hydroxy-2-phenylethyl)-3-methylimidazolium