Selective Sulfonylation of Arenes and Benzoylation of Alcohols Using Lithium Perchlorate as a Catalyst Under Neutral Conditions
作者:B. P. Bandgar、V. T. Kamble、V. S. Sadavarte、L. S. Uppalla
DOI:10.1055/s-2002-25345
日期:——
Sulfonylation of aromatics with p-toluenesulfonyl chloride and benzoylation of alcohols with benzoyl chloride using lithium perchlorate as a catalyst is described. The remarkable selectivity under neutral conditions is an attractive feature of this method
The present invention relates to a process for preparing tetraalkyl bisphosphates by reacting tetrachlorobisphosphates with alcohols, neutralizing the resultant hydrogen chloride with a base, and isolating the salt formed in the neutralization from the reaction mixture as a solid.
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.
Magnetically Separable Copper Ferrite Nanoparticles-Catalyzed Synthesis of Diaryl, Alkyl/Aryl Sulfones from Arylsulfinic Acid Salts and Organohalides/Boronic Acids
作者:B. T. V. Srinivas、Vikas S. Rawat、Kavitha Konda、Bojja Sreedhar
DOI:10.1002/adsc.201301003
日期:2014.3.10
inexpensive, non‐toxic and environmentally benign catalytic system comprised of magnetically separable copper ferrite (CuFe2O4) nanoparticles has been developed for the synthesis of diaryl, alkyl/aryl sulfones. Arylsulfinic acid salts are coupled with various alkyl/aryl halides/boronicacids to afford the corresponding diaryl, alkyl/aryl sulfones in good to excellent yields under the identical catalytic system
由可磁分离的铁氧体铜(CuFe 2 O 4)纳米粒子组成的可回收,廉价,无毒且对环境无害的催化体系已经开发出来,用于合成二芳基,烷基/芳基砜。在相同的催化体系下,将芳基亚磺酸盐与各种烷基/芳基卤化物/硼酸偶联,以良好或优异的收率得到相应的二芳基,烷基/芳基砜。宽泛的官能团耐受性,加上通过施加外部磁场即可轻松回收催化剂,以及连续五个连续循环始终如一的高催化效率,使得该方案在操作上具有吸引力。
Antimony(V) Chloride-Benzyltriethylammonium Chloride Complex as an Efficient Catalyst for Friedel−Crafts Acylation Reactions
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。