Primary sulfonamide as a coupling partner: Copper(I)-catalyzed regioselective cross-coupling of 2-nitro benzenesulfonamides with thiol through the cleavage of Ar–SO<sub>2</sub>NH<sub>2</sub> bonds
作者:Junmin Chen、Kuo Zhang、Yongli Zhao、Shouzhi Pu
DOI:10.1080/00397911.2018.1441420
日期:2018.6.3
article, we have presented a novel and efficient method for the directsynthesis of unsymmetrical sulfides through the copper(I)-catalyzed cross-coupling of 2-nitro benzenesulfonamides with thiols in the presence of catalytic amount of CuI in DMF as solvent at 100 °C. In addition, the products were obtained in high to excellent yields. More importantly, the novelsystem showed the primary 2-nitro benzenesulfonamides
Synthesis of nitrodienes, nitrostyrenes, and nitrobiaryls through palladium-catalyzed couplings of β-nitrovinyl and o-nitroaryl thioethers
作者:Gardner S. Creech、Ohyun Kwon
DOI:10.1039/c3sc50773d
日期:——
A highly efficient, base-free, mild protocol for the palladium-catalyzed, copper-activated desulfitative couplings of vinyl and aryl β-nitrothioethers generates a wide variety of conjugated nitroorganics. Orthogonality to traditional SuzukiâMiyaura coupling is demonstrated, as well as synthetic utility, through reductive Cadogan cyclization, for the formation of indoles, carbazoles, and pyrroles.
Nuclear magnetic resonance spectra of some aromatic sulphur derivatives
作者:C. Brown、D. R. Hogg
DOI:10.1039/j29680001315
日期:——
The n.m.r. spectra of series of 4-substituted-2-nitrophenyl acetonyl sulphides, ethyl sulphides, benzyl sulphides, and ethyl disulphides and of some ethyl 4-substituted-2-nitrobenzenesulphenates have been measured. The frequencies of the methyl and methylene protons give a good correlation with the Hammett σ-constant (r>0·990). Transmission factors of 0·67 ± 0·07, 0·60 ± 0·09, and 0·69 ± 0·16 were
Highly enantioselective catalytic oxidation of alkyl aryl sulfides using Mn-salen catalyst
作者:Chiho Kokubo、Tsutomu Katsuki
DOI:10.1016/0040-4020(96)00851-4
日期:1996.10
Catalytic asymmetricoxidation of sulfides was carried out by usingMn-salencomplex as a catalyst and high enantioselectivity up to 94% was achieved. Enantioselectivity of the reaction was affected by the solvent used and the use of acetonitrile, ethyl propionate, or chlorobenzene generally gave good results.
Enantioselective imidation of alkyl aryl sulfides was achieved by using (R,R)- or (R,S)-Mn-salen complex [(R,R)-3 or (R,S)-3] as a catalyst. The optimum reaction conditions are dependent upon the substrates examined. For example, the imidation of alkyl phenyl sulfides with PhI=NTs using Mn-salen complex (R,R)-3 as a catalyst in the presence of N-methylmorpholine N-oxide showed high enantioselectivity