Highly selective catalytic Friedel–Crafts acylation and sulfonylation of activated aromatic compounds using indium metal
作者:Doo Ok Jang、Kyung Soo Moon、Dae Hyan Cho、Joong-Gon Kim
DOI:10.1016/j.tetlet.2006.06.099
日期:2006.8
Friedel–Crafts acylation of activated benzenes with various aromatic and aliphatic acid chlorides was studied in the presence of indium metal. The reaction was accomplished in high isolated yields under solvent or solvent-less conditions. The method is also applicable for preparing diaryl sulfones from aromatic compounds and aryl sulfonylchlorides.
An efficient method for aromatic Friedel–Crafts alkylation, acylation, benzoylation, and sulfonylation reactions
作者:Ravi P Singh、Rajesh M Kamble、Kusum L Chandra、P Saravanan、Vinod K Singh
DOI:10.1016/s0040-4020(00)01005-x
日期:2001.1
Aromatic electrophilic substitution reactions such as alkylation, acylation, benzoylation, and sulfonylation were studied in the presence of a catalytic amount of Cu(OTf)2 and Sn(OTf)2. Cu(OTf)2 was very efficient for alkylation, acylation, and benzoylation reactions. However, in case of sulfonylation reactions, Sn(OTf)2 gave better results.
A novel catalytic system, the complex of antimony(V) chloride (SbCl5) and benzyltriethylammonium chloride (TEBA), C6H5CH2NEt3(SbCl5)2Cl complex, is described for Friedel–Crafts acylation reactions of aromatics with acyl and sulfonyl chlorides. The catalyst has a number of useful characteristics, such as ready access, minimal toxicity, reusability, insensitivity to atmosphere and moisture, rapid acylation
一种新的催化体系,该复合物的锑(V),氯化锑酸盐(SbCl 5)和苄基三乙基氯化铵(TEBA),C 6 H ^ 5 CH 2净3酸盐(SbCl 5)2 C1复合物,芳烃的Friedel-Crafts酰化反应进行说明与酰基和磺酰氯。该催化剂具有许多有用的特性,例如易于获得,毒性最小,可重复使用,对大气和湿气不敏感,以高收率快速酰化以及易于操作。
The synthesis of diarylsulfones with simple arenes and K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>through double C–S bond formation
作者:Yiqing Yang、Zhang Chen、Yu Rao
DOI:10.1039/c4cc05964f
日期:——
An unprecedented double C-S bond formation method has been developed to prepare both symmetric and unsymmetric diarylsulfones with simple arenes in a single step. This represents the first example that K2S2O8 can be employed as a highly effective sulfonating agent to synthesize diarylsulfones. The reaction demonstrates excellent reactivity, good functional group tolerance and high yields.
Sulfonylation of aromatic compounds with sulfonic acids using silica gel-supported AlCl<sub>3</sub>as a heterogeneous Lewis acid catalyst
作者:Kaveh Parvanak Boroujeni
DOI:10.1080/17415991003777391
日期:2010.6
Silica gel-supported aluminum chloride (SiO2–AlCl3) has been shown to be a mild, efficient, and chemoselective heterogeneous Lewis acid catalyst for direct conversion of arenes to sulfones usingsulfonicacids as sulfonylating agents. The catalyst can be prepared easily with cheap starting materials and is stable (as a bench-top catalyst) and reusable.