Boron-Catalyzed N-Alkylation of Amines using Carboxylic Acids
作者:Ming-Chen Fu、Rui Shang、Wan-Min Cheng、Yao Fu
DOI:10.1002/anie.201503879
日期:2015.7.27
A boron‐based catalyst was found to catalyze the straightforward alkylation of amines with readily available carboxylic acids in the presence of silane as the reducing agent. Various types of primary and secondary amines can be smoothly alkylated with good selectivity and good functional‐group compatibility. This metal‐free amine alkylation was successfully applied to the synthesis of three commercial
Ureate Titanium Catalysts for Hydroaminoalkylation: Using Ligand Design to Increase Reactivity and Utility
作者:Manfred Manßen、Danfeng Deng、Cameron H. M. Zheng、Rebecca C. DiPucchio、Dafa Chen、Laurel L. Schafer
DOI:10.1021/acscatal.1c00014
日期:2021.4.16
earth-abundant and cost-efficient titanium catalyst generated in situ using commercially available Ti(NMe2)4 and a simple to synthesize urea proligand. This system demonstrates high TOFs for hydroaminoalkylation with unactivated substrates and features easy to use commercially available titanium amido precursors. Additionally, a high catalytic activity, scope of reactivity, and regioselectivity are all demonstrated
Bidentate geometry-constrained iminopyridyl nickel-catalyzed synthesis of amines or imines via borrowing hydrogen or dehydrogenative condensation
作者:Yong Jiang、Miao Hu、Nan Sun、Baoxiang Hu、Zhenlu Shen、Xinquan Hu、Liqun Jin
DOI:10.1016/j.tetlet.2020.152604
日期:2020.12
efficient Ni-catalyzed N-alkylation of various anilines with alcohols via borrowing hydrogen is reported using a bidentate geometry-constrained iminopyridyl nickel complex as the catalyst. Substituted benzylic alcohols and short/long chain aliphatic alcohols could be applied as the alkylation sources to couple with aromatic and heteroaromatic amines to give a diverse set of N-alkylation outcomes in moderate
Formal Direct Cross‐Coupling of Phenols with Amines
作者:Zhengwang Chen、Huiying Zeng、Simon A. Girard、Feng Wang、Ning Chen、Chao‐Jun Li
DOI:10.1002/anie.201506751
日期:2015.11.23
The transition‐metal‐catalyzedamination of arylhalides has been the most powerful method for the formation of arylamines over the past decades. Phenols are regarded as ideal alternatives to arylhalides as coupling partners in cross‐couplings. An efficient palladium‐catalyzed formal cross‐coupling of phenols with various amines and anilines has now been developed. A variety of substituted phenols
Manganese‐Catalyzed Hydroarylation of Unactivated Alkenes
作者:Ting Liu、Yunhui Yang、Congyang Wang
DOI:10.1002/anie.202003830
日期:2020.8.17
Transition‐metal‐catalyzed hydroarylation of unactivated alkenes with strategic use of remote coordinating functional groups has received significant attention recently to address the issues of both low reactivity and poor selectivity. The bidentate 8‐aminoquinoline amide group is the most successfully adopted in unactivated alkenes for Pd and Ni catalysis. We describe the first manganese‐catalyzed hydroarylation