Mild and Efficient Palladium-Catalyzed Direct Trifluoroethylation of Aromatic Systems by C−H Activation
作者:Balázs L. Tóth、Szabolcs Kovács、Gergő Sályi、Zoltán Novák
DOI:10.1002/anie.201510555
日期:2016.2.5
With the utilization of a highly active trifluoroethyl(mesityl)iodonium salt, the developed catalytic method enables the first highlyefficient and selective trifluoroethylation of aromaticcompounds. The robust catalytic procedure provides the desired products in up to 95 % yield at 25 °C in 1.5 to 3 hours and tolerates a broad range of functional groups. The utilization of hypervalent reagents opens
A Convenient and Inexpensive Method for Conversion of Thiocarbonyl Compounds to Their Oxo Derivatives Using Oxone Under Solvent-Free Conditions
作者:Iraj Mohammadpoor-Baltork、Majid M. Sadeghi、Karim Esmayilpour
DOI:10.1081/scc-120016359
日期:2003.1.4
Abstract A series of thioamides, thioureas and thioesters are transformed to their corresponding carbonyl compounds in good to excellent yields with oxone under solid phase conditions, while thioketones remained unchanged under these conditions.
Efficient and Convenient Deprotection of Thiocarbonyl to Carbonyl Compounds Using 3-Carboxypyridinium and 2,2'-Bipyridinium Chlorochromates in Solution, Dry Media, and under Microwave Irradiation
deprotection reactions is reported. Different types of thioamides, thioureas, thiono esters, and thioketones are deprotected to their corresponding carbonyl compounds with these reagents in good to excellent yields. The reactions were carried out in solution, under solvent-free conditions, and under microwave irradiation. The results show that with both reagents the rates of the reactions and the yields
12-Tungstosilicic acid (H4SiW12O40) is applied for the conversion of a series of thioamides to their corresponding oxo analogues in excellent yields in acetonitrile. In the case of thioketones, no reaction is observed under these conditions. The reusability of the catalyst also is investigated.
Bismuth(III) nitrate pentahydrate: a convenient and selective reagent for conversion of thiocarbonyls to their carbonyl compounds
作者:Iraj Mohammadpoor-Baltork、Mohammad Mehdi Khodaei、Kobra Nikoofar
DOI:10.1016/s0040-4039(02)02516-9
日期:2003.1
A variety of thioamides and thioureas are rapidly transformed to their oxoderivatives with Bi(NO3)3·5H2O in excellent yields. However, thiono esters and thioketones are converted to their corresponding carbonyl compounds in only poor yields. Bi(NO3)3·5H2O is relatively non-toxic, insensitive to air and inexpensive. These features coupled with the selective deprotection of thioamides and thioureas