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.
Novel Mesoionic Insecticidal Compound
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Paragraph 0294-0295, (2020/02/05)
The purpose of the present invention is to provide a mesoionic compound, which exhibits an improved controlling effect on various harmful organisms, or a salt thereof. A mesoionic compound represented by formula (1) (wherein: R1 is selected from a hydrogen atom, etc.; R2 represents an optionally substituted phenyl group; R3 is selected from a hydrogen atom, etc.; R4 is selected from a hydrogen atom, etc.; R5 is selected from an optionally substituted ethylene group, etc.; and X is selected from an oxygen atom, etc.) or a salt thereof.
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.)
Enantioselective Synthesis of Spiroindenes by Enol-Directed Rhodium(III)-Catalyzed C-H Functionalization and Spiroannulation
Reddy Chidipudi, Suresh,Burns, David J.,Khan, Imtiaz,Lam, Hon Wai
supporting information, p. 13975 - 13979 (2016/01/25)
Chiral cyclopentadienyl rhodium complexes promote highly enantioselective enol-directed C(sp2)-H functionalization and oxidative annulation with alkynes to give spiroindenes containing all-carbon quaternary stereocenters. High selectivity betwe
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.
Copper(I)-catalyzed C-C and C-O coupling reactions using hydrazone ligands
Mino, Takashi,Yagishita, Fumitoshi,Shibuya, Masanori,Kajiwara, Kenji,Shindo, Hiroaki,Sakamoto, Masami,Fujita, Tsutomu
experimental part, p. 2457 - 2460 (2010/01/07)
Copper-catalyzed C-C coupling reaction of aryl iodides with diethylmalonate in toluene at 90C gave arylated malonates using 5 mol% of CuI with hydrazone 1a as a ligand in good yields under an aerobic atmosphere. We also found CuI/hydrazone 1b in toluene to be an efficient catalytic system for C-O coupling reactions of aryl bromides with phenols to give aryl ethers in good yields at 110C under an aerobic atmosphere.
CuI/L-proline-catalyzed coupling reactions of aryl halides with activated methylene compounds
Xie, Xiaoan,Cai, Guorong,Ma, Dawei
, p. 4693 - 4695 (2007/10/03)
(Chemical Equation Presented) The arylation of ethyl acetoacetate, ethyl benzoyl acetate, and diethyl malonate under the catalysis of Cul/L-proline in DMSO proceeds smoothly at 40-50°C in the presence of Cs2CO 3 to provide the 2-aryl
A general and mild copper-catalyzed arylation of diethyl malonate
Hennessy, Edward J.,Buchwald, Stephen L.
, p. 269 - 272 (2007/10/03)
Chemical equation presented A general method for the synthesis of α-aryl malonates is described. The coupling of an aryl iodide and diethyl malonate in the presence of Cs2CO3 and catalytic amounts of copper(I) iodide and 2-phenylphenol affords the α-aryl malonate in good to excellent yields. The mild reaction conditions and high levels of functional group compatibility make this an attractive synthetic alternative to previous methods.