The electrochemical in-situ oxidative sulfonylation of phenols with sulfinicacids access to sulfonylated hydroquinones has been developed. A series of sulfonylated hydroquinones were prepared under mild mediator-, catalyst- and exogenous-oxidant-free conditions. Notably, such an electrochemical in-situ-oxidative synthetic strategy presented wide functional group tolerance and amenability to gram-scale
[DE] NEUE TRIPHENDIOXAZINE<br/>[EN] NOVEL TRIPHENODIOXAZINES<br/>[FR] NOUVELLES TRIPHENODIOXAZINES
申请人:——
公开号:WO1999012937A2
公开(公告)日:1999-03-18
[EN] The invention relates to novel triphenodioxazines of formula (I), wherein the substituents and subscripts are as indicated in the description. These novel triphenodioxazines are used for dying and imprinting cellulosic materials, natural and synthetic polyamides, and leather. [FR] L'invention concerne de nouvelles triphénodioxazines de formule (I), dans laquelle les substituants et les indices ont la signification indiquée dans la description. Ces nouvelles triphénodioxazines s'utilisent pour teindre et imprimer des matériaux cellulosiques, des polyamides naturels et synthétiques, ainsi que le cuir. [DE] Die neuen Triphendioxazine entsprechen der Formel (I), worin die Substituenten und Indices die in der Beschreibung angegebene Bedeutung haben, eignen sich zum Färben und Bedrucken von cellulosehaltigen Materialien, natürlichen oder synthetischen Polyamiden und Leder.
Ionic Liquids-Promoted Addition of Arylsulfinic Acids to <i>p</i>-Quinones: A Green Synthesis of Diaryl Sulfones
作者:J. Yadav、B. Reddy、T. Swamy、N. Ramireddy
DOI:10.1055/s-2004-829145
日期:——
Arylsulfinic acids undergo smooth conjugate addition to p-quinones in air- and moisture-stable second generation room temperature ionic liquid [bmim]BF 4 under mild conditions to produce the corresponding arylsulfonylhydroquinones in excellent yields with high selectivity. In this reaction, ionic liquid plays the dual role as the solvent and the catalyst. The quinones show enhanced reactivity in ionic