Benzylamines via Iron-Catalyzed Direct Amination of Benzyl Alcohols
作者:Tao Yan、Ben L. Feringa、Katalin Barta
DOI:10.1021/acscatal.5b02160
日期:2016.1.4
with simpler amines through the borrowing hydrogen methodology, producing a variety of substituted secondary and tertiary benzylamines in moderate to excellent yields for the first time with an iron catalyst. Notably, we explore the versatility of this methodology in the one-pot synthesis of nonsymmetric tertiaryamines, sequential functionalization of diols with distinctly different amines, and the synthesis
Development of a General Non-Noble Metal Catalyst for the Benign Amination of Alcohols with Amines and Ammonia
作者:Xinjiang Cui、Xingchao Dai、Youquan Deng、Feng Shi
DOI:10.1002/chem.201203417
日期:2013.3.11
The N‐alkylation of amines or ammonia with alcohols is a valuable route for the synthesis of N‐alkyl amines. However, as a potentially clean and economic choice for N‐alkyl amine synthesis, non‐noble metal catalysts with high activity and good selectivity are rarely reported. Normally, they are severely limited due to low activity and poor generality. Herein, a simple NiCuFeOx catalyst was designed
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
Mitsunobu Reaction Using Basic Amines as Pronucleophiles
作者:Hai Huang、Jun Yong Kang
DOI:10.1021/acs.joc.7b00622
日期:2017.7.7
reaction to include amine nucleophiles to form C–N bonds through the utilization of N-heterocyclic phosphine-butane (NHP-butane) has been developed. Both aliphatic alcohols and benzyl alcohols are suitable substrates for C–N bond construction. Various acidic nucleophiles such as benzoic acids, phenols, thiophenol, and secondary sulfonamide also provide the desired products of esters, ethers, thioether
Photochemical benzylic bromination in continuous flow using BrCCl<sub>3</sub> and its application to telescoped <i>p</i>-methoxybenzyl protection
作者:Yuma Otake、Jason D. Williams、Juan A. Rincón、Oscar de Frutos、Carlos Mateos、C. Oliver Kappe
DOI:10.1039/c9ob00044e
日期:——
BrCCl3 represents a rarely used benzylic brominating reagent with complementary reactivity to other reagents. Its reactivity has been revisited in continuous flow, revealing compatibility with electron-rich aromatic substrates. This has brought about the development of a p-methoxybenzyl bromide generator for PMB protection, which was successfully demonstrated on a pharmaceutically relevant intermediate