71182-65-5Relevant academic research and scientific papers
A Metal-Free Direct Arene C?H Amination
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.
supporting information, p. 2783 - 2795 (2021/04/05)
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.).
COLORED CURABLE RESIN COMPOSITION
-
Paragraph 0478; 0537-0538, (2016/10/09)
A colored curable resin composition which comprises a colorant, a resin, a polymerizable compound, a polymerization initiator and a solvent, wherein the colorant includes a compound represented by formula (I). (In the formula, L is a sulphonyl group, etc., X is an oxygen atom, etc., R7 to R13 is each independently a hydrogen atom, etc., and Z is a group represented by formula (Z1) (In the formula, R1 is an alkyl group having 1 to 20 carbon atoms, -CH2- that constitutes the alkyl group capable of being substituted with an oxygen atom, R2 to R6 is each independently a hydrogen atom, etc. and * is a bond.) or a group represented by formula (Z2) (In the formula, Ar1 is phenyl group having an alkyl group having 1 to 8 carbon atoms in an ortho position, meta position or both, and * is a bond.).)
