The reaction of N,N-disubstitutedthioamide–bromineadducts with unsubstituted thioamide, followed by treatment with triethylamine, affords novel N′-thiobenzoylamidines along with smaller amounts of secondary products. A mechanism is proposed for the formation of the amidines. The results give an insight into the initial steps of the mechanism by which thioamides are converted into 1,2,4-thiadiazoles
lanthanide catalysts showed high catalytic activity and a wide scope of substrates with good to excellent yields under solvent‐freeconditions. Efficient activation of the transamidation can be realized by the above complexes acting as cooperative acid–base bifunctional catalysts, which are proposed to be responsible for the higher reactivity in comparison with simple monometallic catalysts.
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.