Sodium Butylated Hydroxytoluene (NaBHT) as a New and Efficient Hydride Source for Pd‐Catalysed Reduction Reactions
作者:Sepideh Sharif、Michael J. Rodriguez、Yu Lu、Michael E. Kopach、David Mitchell、Howard N. Hunter、Michael G. Organ
DOI:10.1002/chem.201902876
日期:2019.10.11
for the efficient arylation of various base-sensitive amines and (hetero)aryl halides has been found to have an unanticipated role as a hydride donor to reduce (hetero)aryl halides and allylic acetates. Mechanisticstudies have uncovered that NaBHT, but not BHT, can deliver multiple hydrides through oxidation of the benzylic methyl group in NaBHT to the aldehyde. Further, performing the reduction with
Exploiting the Reactivity of Isocyanide: Coupling Reaction between Isocyanide and Toluene Derivatives Using the Isocyano Group as an N1 Synthon
作者:Zhiqiang Liu、Xinglu Zhang、Jianxiong Li、Feng Li、Chunju Li、Xueshun Jia、Jian Li
DOI:10.1021/acs.orglett.6b01928
日期:2016.8.19
An unusual oxidative coupling reaction of isocyanide and toluene derivatives using tetrabutylammonium iodide (TBAI) as a catalyst is disclosed. The experimental results and mechanistic study show that the isocyano group acts formally as an N1 synthon during the transformation, thus expanding the reactivity profile of isocyanide.
Cross-Coupling of Primary Amides to Aryl and Heteroaryl Partners Using (DiMeIHept<sup>Cl</sup>)Pd Promoted by Trialkylboranes or B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>
作者:Sepideh Sharif、Jonathan Day、Howard N. Hunter、Yu Lu、David Mitchell、Michael J. Rodriguez、Michael G. Organ
DOI:10.1021/jacs.7b09488
日期:2017.12.27
the coupling of amide nucleophiles to a wide variety of oxidativeadditionpartners using Pd-NHC catalysts. Through a combination of NMR spectroscopy and control studies with and without oxygen and radical scavengers, we propose that boron-imidates form under the basic reaction conditions that aid coordination of nitrogen to Pd(II), which is rate limiting, and directly delivers the intermediate for reductive
Efficient Manganese/Copper Bimetallic Catalyst for<i>N</i>-Arylation of Amides and Sulfonamides Under Mild Conditions in Water
作者:Yong-Chua Teo、Fui-Fong Yong、Idzham Khalid Ithnin、Siew-Hui Trionna Yio、Zhiyin Lin
DOI:10.1002/ejoc.201201218
日期:2013.1
An efficient and mild method using a bimetallic MnF2/CuI catalyst at 60 °C in water was developed for the N-arylation of amides and sulfonamides with aryl halides. A variety of functionalized amides and sulfonamides were coupled with different substituted aryl halides to afford the corresponding N-arylated products in good to excellent yields (up to 97 %).
开发了一种在 60 °C 下在水中使用双金属 MnF2/CuI 催化剂的有效且温和的方法,用于酰胺和磺酰胺与芳基卤化物的 N-芳基化。各种官能化酰胺和磺酰胺与不同的取代芳基卤化物偶联,以良好至极好的产率(高达 97%)提供相应的 N-芳基化产物。
Stable and Reusable Binaphthyl‐Supported Palladium Catalyst for Aminocarbonylation of Aryl Iodides
作者:Nidhi Sharma、Govindasamy Sekar
DOI:10.1002/adsc.201500642
日期:2016.1.21
A binaphthyl‐supported Pd nanoparticles (Pd‐BNP)‐catalyzed aminocarbonylation of aryliodides in the presence of carbon monoxide and amines for the synthesis of amides has been developed. This methodology provides an efficient route for the synthesis of a COX‐2 enzyme inhibitor having anti‐inflammatory activity.