Anionic N-Fries Rearrangement of N-Carbamoyl Diarylamines to Anthranilamides. Methodology and Application to Acridone and Pyranoacridone Alkaloids
摘要:
A general alkyllithium/LDA-mediated rearrangement of N-carbamoyl diarylamines 7a-g into the anthranilamides 8a-g and 9a-g (Table 1) is presented and applied to a regioselective efficient construction of acridone (17) and pyranoacridone (18) alkaloids (Scheme 4).
A Tetraarylpyrrole‐Based Phosphine Ligand for the Palladium‐Catalyzed Amination of Aryl Chlorides
作者:Masahiro Sai
DOI:10.1002/adsc.202100731
日期:2021.12.21
A tetraarylpyrrole-based phosphine ligand L1 in combination with Pd(dba)2 provided a catalyst for the Buchwald-Hartwig amination reaction. A variety of amines were rapidly coupled with aryl chlorides at a Pd loading of 0.5 mol%. The selective monoarylation of aliphatic primary amines was achieved in the presence of 0.8 equiv. water. Comparison experiments were also conducted, which revealed that the
Reductive Molybdenum-Catalyzed Direct Amination of Boronic Acids with Nitro Compounds
作者:Samuel Suárez-Pantiga、Raquel Hernández-Ruiz、Cintia Virumbrales、María R. Pedrosa、Roberto Sanz
DOI:10.1002/anie.201812806
日期:2019.2.11
The synthesis of aromatic amines is of utmost importance in a wide range of chemical contexts. We report a direct amination of boronic acids with nitro compounds to yield (hetero)aryl amines. The novel combination of a dioxomolybdenum(VI) catalyst and triphenylphosphine as inexpensive reductant has revealed to be decisive to achieve this new C−N coupling. Our methodology has proven to be scalable,
Stable Nickel(0) Phosphites as Catalysts for CN Cross-Coupling Reactions
作者:Sven S. Kampmann、Alexandre N. Sobolev、George A. Koutsantonis、Scott G. Stewart
DOI:10.1002/adsc.201400201
日期:2014.6.16
phosphite‐based catalysts for use in the CNcross‐couplingreaction. The combination of nickel tetrakis(triphenyl phosphite) Ni[P(OPh)3]4} and 1,1′‐bis(diphenylphosphino)ferrocene (dppf), and in particular a newly developed catalyst (dppf)Ni[P(OPh)3]2, were found to be extremely effective in catalyzing a range of amination reactions of anilines and amines with aryl chlorides. This new catalyst system offers
Pd-Catalyzed Synthesis of Aryl Amines via Oxidative Aromatization of Cyclic Ketones and Amines with Molecular Oxygen
作者:Simon A. Girard、Xiong Hu、Thomas Knauber、Feng Zhou、Marc-Olivier Simon、Guo-Jun Deng、Chao-Jun Li
DOI:10.1021/ol3027279
日期:2012.11.2
Pd-catalyzed intermolecular aerobic dehydrogenative aromatizations have been developed for the arylation of amines with nonaromatic ketones. Under optimized reaction conditions, primary and secondary amines are selectively arylated in good yields with cyclohexanones and 2-cyclohexen-1-ones in the presence of a Pd-catalyst under an atmosphere of molecular oxygen.