Activation of superoxide; efficient desulphurization of thioamides to the corresponding amides using a peroxyphosphorus intermediate generated from phenylphosphonic dichloride and superoxide
作者:Yong Hae Kim、Sang Chul Lim、Hae Sung Chang
DOI:10.1039/c39900000036
日期:——
Treatment of thioamides with a peroxyphosphorusintermediategeneratedfromphenylphosphonicdichloride and superoxide (O2˙–) at –4 °C in acetonitrile gave the correspondingamides in excellent yields.
Novel desulfurization of thiocarbonyl compounds into their carbonyl compounds with tertiary butyl thionitrate
作者:Kim Hyung Jin、Kim Yong Hae
DOI:10.1016/s0040-4039(00)95389-9
日期:1987.1
Various thiocarbonyl compounds such as thioamides, thiocabamate, thiocarbonate, trithiocarbonate, and thioketone were readily reacted with t-butyl thionitrate (t-BuSNO2) to give the corresponding carbonyl compounds in excellent yields under mild conditions. Desulfurization seems to be initiated the selective nitrosation on the sulfur atom of thiocarbonyl group with t-BuSNO2.
Lawesson's reagent for direct thionation of hydroxamic acids: Substituent effects on LR reactivity
作者:Witold Przychodzeń
DOI:10.1002/hc.20259
日期:——
To explore the generality and scope of direct thionation of hydroxamicacids (HAs), the reaction of various structurally diverse HAs with Lawesson's reagent was investigated. The yield of thiohydroxamic acid (THAs) is poor when HAs possess bulky acyl and/or N-substituents, acidic α-hydrogen atoms, or an N-phenyl ring. THAs yields were correlated with Brown sigma parameter. The relative rates of two
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.