与通过改变有机取代基的空间和电子性质来改变过渡金属和有机催化剂的反应性和选择性的常规策略相反,我们在此证明了一种新颖的方法,即亚胺臂的σ(σ)亲核性可以显着提高在伪脱芳香化的PN 3 P *钳位配体平台中增强,达到前所未有的N-杂环卡宾样反应性。因此,PN 3 P * Ni-H钳形络合物的亚胺臂可有效催化醛的氢化硅烷化,二氧化碳(CO 2)与环氧化物的环加成反应,并在Ru催化的胺与醇的脱氢酰化反应中用作配体。
Highly Efficient Copper-Catalyzed Amidation of Benzylic Hydrocarbons Under Neutral Conditions
作者:Eva-Louise Howard、Norman Guzzardi、Viliyana G. Tsanova、Angeliki Stika、Bhaven Patel
DOI:10.1002/ejoc.201701759
日期:2018.2.14
A ligand free method has been developed for the amidation of benzylichydrocarbons. A range of benzylicamides has been prepared with the use of dicumyl peroxide and a copper catalyst in good to excellent yields.
C–N Coupling of Amides with Alcohols Catalyzed by N-Heterocyclic Carbene–Phosphine Iridium Complexes
作者:Sutthichat Kerdphon、Xu Quan、Vijay Singh Parihar、Pher G. Andersson
DOI:10.1021/acs.joc.5b01324
日期:2015.11.20
N-Heterocycliccarbene–phosphineiridiumcomplexes (NHC–Ir) were developed/found to be a highly reactive catalyst for N-monoalkylation of amides with alcohols via hydrogen transfer. The reaction produced the desired product in high isolated yields using a wide range of substrates with low catalyst loading and short reaction times.
Copper-Catalyzed Ligand-Free Amidation of Benzylic Hydrocarbons and Inactive Aliphatic Alkanes
作者:Hui-Ting Zeng、Jing-Mei Huang
DOI:10.1021/acs.orglett.5b02063
日期:2015.9.4
An efficientcopper-catalyzedamidation of benzylichydrocarbons and inactive aliphatic alkanes with simple amides was developed. The protocol proceeded smoothly without any ligand, and a wide range of N-alkylated aromatic and aliphatic amides, sulfonamides, and imides were synthesized in good yields.
A simple base-mediated amidation of aldehydes with azides
作者:Sameer S. Kulkarni、Xiangdong Hu、Roman Manetsch
DOI:10.1039/c2cc37289d
日期:——
A practical and efficient amidation reaction involving aromatic aldehydes and various azides under mild conditions is described. A broad spectrum of functional groups was tolerated, and the amides were synthesized in moderate to excellent yields, presenting an attractive alternative to the currently available synthetic methods.
induced by ultraviolet (UV) light. Forty-six examples with various functional groups are explored at room temperature with irradiation by three 26 W UV lamps (350–380 nm). The yield reaches 97%. The gram scale experiment product yield is 76%. Moreover, this system can be applied to the synthesis of several amino acid derivatives. Mechanistic studies show that benzoin is generated in situ from benzil under