Sodium Dithionite‐Mediated Decarboxylative Sulfonylation: Facile Access to Tertiary Sulfones
作者:Yaping Li、Shihao Chen、Ming Wang、Xuefeng Jiang
DOI:10.1002/anie.202001589
日期:2020.6.2
A straightforward multicomponent decarboxylative cross coupling of redox-active esters (N-hydroxyphthalimide ester), sodium dithionite, and electrophiles was established to construct sterically bulky sulfones. The inorganic salt sodium dithionite not only served as the sulfur dioxide source, but also acted as an efficient radical initiator for the decarboxylation. Notably, diverse naturally abundant
Oxidation of thioethers and sulfoxides with hydrogen peroxide using TS-1 as catalyst
作者:Denis J. Robinson、Lucinda Davies、Neil McGuire、Darren F. Lee、Paul McMorn、311J. Willock、Graeme W. Watson、Philip C. Bulman Page、Donald Bethell、311J. Hutchings
DOI:10.1039/a907605k
日期:——
used to investigate the origin of this effect. For all substrates used in this study, the oxidation of the thioether to the sulfoxide was found to occur readily by a non-catalysed solution reaction and this was studied in detail. However, the oxidation of the sulfoxide to the sulfone was only observed in the catalysed reactions. It was observed that the non-catalysed reaction can be suppressed by carrying
General sulfone construction <i>via</i> sulfur dioxide surrogate control
作者:Shihao Chen、Yaping Li、Ming Wang、Xuefeng Jiang
DOI:10.1039/c9gc03841h
日期:——
sulfones with a facile combination of halides, sulfurdioxide surrogates and phosphate esters is described. When thiourea dioxide was employed as a reductive sulfurdioxide surrogate, alkyl–alkyl sulfones were obtained under transitionmetal free conditions. Aryl–alkyl sulfones were obtained with an extremely low catalytic loading (0.2 mol%) via altering the mask of sulfurdioxide surrogates to sodium