Regioselective transition metal- and halogen-free direct dithiolation at C(sp<sup>3</sup>)–H of nitrotoluenes with diaryl disulfides
作者:Shailesh Kumar、Rahul Kadu、Sangit Kumar
DOI:10.1039/c6ob01856d
日期:——
tert-butoxide-mediated regioselective direct C–S bond formation at the C(sp3)–H position of nitrotoluenes with disulfides in DMSO at room temperature. The developed reaction generated, in good yields, various dithioacetals having OMe, halogen, and NH2 functionalities at various positions of the arene rings of the disulfides. Interestingly, in the absence of nitrotoluene, diaryldisulfides and diselenides underwent one-carbon
The Reaction of (Arylthio)trimethylstannanes with 1-Aryl-1-bromoethanes: Effect of Substituent on the Process Shifting from Unimolecular to Bimolecular Substitution
作者:Seizi Kozuka、Hisashi Nakamura
DOI:10.1246/bcsj.64.2407
日期:1991.8
kinetic study has been conducted on the reaction of (arylthio)trimethylstannanes with 1-aryl-1-bromoethanes. The reaction of the arylbromoethane bearing an electron-donating substituent was found involving unimolecular ionization of the arylbromoethane. The other reactions, however, were found to be second-order reactions. The nature of the second-order reactions was shifted from one involving unimolecular
A metal-free procedure for the synthesis of thioethers is described via the base-promoted reductive coupling of tosylhydrazones with thiols through an insertion of a carbene into the S–H bond.
Substituted (RS,SR)-1-phenylethyl phenylsulfoxides (threo) (XC6H4S(O)CH(CH3)C6H4Y) and some substituted (RR,SS)-sulfoxides (erythro) were prepared and kinetic investigation for the thermal decomposition was carried out at 80.0, 90.0, and 100.0 °C in dioxane. Hammett plots for threo-XC6H4S(O)CH(CH3)C6H5 gave positive ρ-values (ρX=0.60–0.64 at three temperatures), while those for threo- and erythro