1997-28-0Relevant articles and documents
Radical Addition Enables 1,2-Aryl Migration from a Vinyl-Substituted All-Carbon Quaternary Center
Li, Zexian,Shi, Zhuangzhi,Wang, Minyan
supporting information, p. 186 - 190 (2020/11/02)
An efficient method for photocatalytic perfluoroalkylation of vinyl-substituted all-carbon quaternary centers involving 1,2-aryl migration has been developed. The rearrangement reactions use fac-Ir(ppy)3, visible light and commercially available fluoroalkyl halides and can generate valuable multisubstituted perfluoroalkylated compounds in a single step that would be challenging to prepare by other methods. Mechanistically, the photoinduced alkyl radical addition to an alkene leads to the migration of a vicinal aryl substituent from its adjacent all-carbon quaternary center with the concomitant generation of a C-radical bearing two electron-withdrawing groups that is further reduced by a hydrogen donor to complete the domino sequence.
Mesoionic Compound
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Paragraph 0358; 0359, (2018/11/21)
The purpose of the present invention is to provide a mesoionic compound or a salt thereof that exhibits excellent control activity against various pests. Provided is a mesoionic compound represented by formula (1). (In the formula, Ra represents a hydrogen atom or a methyl group, R1 represents a phenyl group or pyridyl group which is optionally substituted with up to two substituents selected independently from R2, and R2 represents a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a methyl group, an ethyl group, an n-propyl group, an i-propyl group, a c-propyl group, an n-butyl group, an i-butyl group, an s-butyl group, a t-butyl group, a fluoromethyl group, a difluoromethyl group, a trifluoromethyl group, a methyloxy group, an ethyloxy group, an n-propyloxy group, an i-propyloxy group, a c-propyloxy group, an n-butyloxy group, an i-butyloxy group, a s-butyloxy group, a t-butyloxy group, an n-pentyloxy group, a trifluoromethyloxy group, a 2,2,2-trifluoroethyloxy group, a methylthio group, a methylsulfoxy group, a methylsulfonyl group, a vinyl group, an ethynyl group, etc.)
C-arylation reactions catalyzed by CuO-nanoparticles under ligand free conditions
Kidwai, Mazaahir,Bhardwaj, Saurav,Poddar, Roona
scheme or table, (2010/07/15)
CuO-nanoparticles were found to be an excellent heterogeneous catalyst for C-arylation of active methylene compounds using various aryl halides. The products were obtained in good to excellent yield. The catalyst can be recovered and reused for four cycles with almost no loss in activity.
