- A Metal-Free Direct Arene C?H Amination
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The synthesis of aryl amines via the formation of a C?N bond is an essential tool for the preparation of functional materials, active pharmaceutical ingredients and bioactive products. Usually, this chemical connection is only possible by transition metal-catalyzed reactions, photochemistry or electrochemistry. Here, we report a metal-free arene C?H amination using hydroxylamine derivatives under benign conditions. A charge transfer interaction between the aminating reagents TsONHR and the arene substrates enables the chemoselective amination of the arene, even in the presence of various functional groups. Oxygen was crucial for an effective conversion and its accelerating role for the electron transfer step was proven experimentally. In addition, this was rationalized by a theoretical study which indicated the involvement of a dioxygen-bridged complex with a “Sandwich-like” arrangement of the aromatic starting materials and the aminating agents at the dioxygen molecule. (Figure presented.).
- Wang, Tao,Hoffmann, Marvin,Dreuw, Andreas,Hasagi?, Edina,Hu, Chao,Stein, Philipp M.,Witzel, Sina,Shi, Hongwei,Yang, Yangyang,Rudolph, Matthias,Stuck, Fabian,Rominger, Frank,Kerscher, Marion,Comba, Peter,Hashmi, A. Stephen K.
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supporting information
p. 2783 - 2795
(2021/04/05)
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- PYRIMIDINE COMPOUNDS AND PYRIMIDO INDOLE COMPOUNDS AND METHODS OF USE
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The present invention discloses substituted pyrimidine and pyrimido indole compounds and optionally pharmaceutically acceptable salts, hydrates or solvates thereof. A method of treating a patient having cancer or a disease comprising administering to a patient an effective amount of the compound or pharmaceutically acceptable salt, hydrate, or solvate thereof.
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- Facile synthesis and antitumor activity of novel N(9) methylated AHMA analogs
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A facile synthesis of novel antitumor N(9)-methyl-3-(9-acridinylamino)-5- hydroxymethylaniline (AHMA) derivatives is described. Boc protection of aminobenzoic acids followed by LiAlH4 reduction yielded novel methylaminobenzyl alcohol reactants. Their interaction with 9-chloroacridine provides N(9)-methylated AHMA derivatives for biological screening. A preliminary anti-proliferative assay against seven cancer cell lines identified compounds with low μM IC50 values. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
- Redko, Boris,Albeck, Amnon,Gellerman, Gary
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p. 2188 - 2191
(2013/01/15)
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- LITHIATION ROUTES TO OXINDOLES AND 2-INDOLINETHIONES: PRECURSORS TO 2,2'-DITHIOBISINDOLES WITH TYROSINE KINASE INHIBITORY PROPERTIES
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N-Substituted oxindoles and 2-indolinethiones can be prepared by lithiation of carboxyl protected N,2-dimethylanilines followed by quenching with CO2 or CS2 respectively. 2-Indolinethione derivatives are also available via demethylation of 2-methylthioindoles, which are prepared by lithiation of N-substituted indoles and treatment with dimethyl disulfide.
- Rewcastle, Gordon W.,Denny, William A.
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p. 701 - 708
(2007/10/02)
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