This paper describes the direct oxidation of pyridines to pyridine-N-oxides by means of 30% H2O2 in aq media in the presence of Na2WO4.2H(2)O as catalyst instead of with per-acids or 30% H2O2 in acetic acid. Good yiel...This paper describes the direct oxidation of pyridines to pyridine-N-oxides by means of 30% H2O2 in aq media in the presence of Na2WO4.2H(2)O as catalyst instead of with per-acids or 30% H2O2 in acetic acid. Good yields were obtained.展开更多
Pyridine-N-oxide serves as an efficient catalyst for the ring-opening reactions of N-tosylaziridines with various aryl thiols under mild conditions. This transformation is highly effective, which gives rise to the cor...Pyridine-N-oxide serves as an efficient catalyst for the ring-opening reactions of N-tosylaziridines with various aryl thiols under mild conditions. This transformation is highly effective, which gives rise to the corresponding β-amino sulfides in good to excellent yields.展开更多
An efficient and practical method is described for the ring-opening reactions of N-tosylaziridines with various thiols in water under mild conditions. Various surfactants have been evaluated to optimize the reactions....An efficient and practical method is described for the ring-opening reactions of N-tosylaziridines with various thiols in water under mild conditions. Various surfactants have been evaluated to optimize the reactions. Under optimal conditions, these reactions gave rise to the corresponding β-amino sulfides in good to excellent yields.展开更多
文摘This paper describes the direct oxidation of pyridines to pyridine-N-oxides by means of 30% H2O2 in aq media in the presence of Na2WO4.2H(2)O as catalyst instead of with per-acids or 30% H2O2 in acetic acid. Good yields were obtained.
基金Project supported by the National Natural Science Foundation of China （Nos. 20862009 and 20962010） and the Natural Science Foundation of Jiangxi Province （No. 2008GQH0026）.
文摘Pyridine-N-oxide serves as an efficient catalyst for the ring-opening reactions of N-tosylaziridines with various aryl thiols under mild conditions. This transformation is highly effective, which gives rise to the corresponding β-amino sulfides in good to excellent yields.
基金Project supported by the National Natural Science Foundation of China （Nos. ＇20862009, 20962010）, Jiangxi Educational Committee （No. G J J10386） and the National Natural Science Foundation of Jiangxi Province （No. 2008GQH0026）.
文摘An efficient and practical method is described for the ring-opening reactions of N-tosylaziridines with various thiols in water under mild conditions. Various surfactants have been evaluated to optimize the reactions. Under optimal conditions, these reactions gave rise to the corresponding β-amino sulfides in good to excellent yields.
