FeX3（X = Cl, Br） were found to be very effective reagents and powerful catalysts for regioselective ring openings of a variety of N-tosylaziridines with them to afford the corresponding b-haloamines in good to excel...FeX3（X = Cl, Br） were found to be very effective reagents and powerful catalysts for regioselective ring openings of a variety of N-tosylaziridines with them to afford the corresponding b-haloamines in good to excellent yields with high regioselectivity under mild conditions. At the same time, 13 new compounds were obtained firstly. Moreover, the b-bromoamine prepared could be transferred into b-nitroamine with NaNO2 in moderate yield.展开更多
An efficient and water tolerant method for the synthesis ofβ-haloamines is described utilizing hydrated nickel（Ⅱ） halides （NiX_2ⅩnH_2O X = Cl,Br,I） and aziridines as starting materials.N-Tosylaziridines reacted...An efficient and water tolerant method for the synthesis ofβ-haloamines is described utilizing hydrated nickel（Ⅱ） halides （NiX_2ⅩnH_2O X = Cl,Br,I） and aziridines as starting materials.N-Tosylaziridines reacted with NiCl_2·6H_2O or NiI_2·6H_2O givingβ-chloro -orβ-iodoamines in high yields（73-99%） within a short time,but 10 mol%of n-Bu_4NBr should be added in the reactions of N-tosylaziridines with NiBr_2·3H_2O in order to obtain the high yields of correspondingβ-bromoamines.Solvent played an important role in the reactions.The proper solvent for the reaction of NiCl_2·6H_2O was DMF,while NiBr_2·3H_2O or NiI_2·6H_2O proceeded well in 1,4-dioxane.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
基金the Natural Science Foundation of Shanxi Province (Nos. 2012021007-2, 2011011010-2) for financial supportsupported by Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (No. 20120006)
文摘FeX3（X = Cl, Br） were found to be very effective reagents and powerful catalysts for regioselective ring openings of a variety of N-tosylaziridines with them to afford the corresponding b-haloamines in good to excellent yields with high regioselectivity under mild conditions. At the same time, 13 new compounds were obtained firstly. Moreover, the b-bromoamine prepared could be transferred into b-nitroamine with NaNO2 in moderate yield.
基金supported by the National Natural Science Foundation of China(No20872031)Hubei Provincial Department of Eduction(NoT200701)
文摘An efficient and water tolerant method for the synthesis ofβ-haloamines is described utilizing hydrated nickel（Ⅱ） halides （NiX_2ⅩnH_2O X = Cl,Br,I） and aziridines as starting materials.N-Tosylaziridines reacted with NiCl_2·6H_2O or NiI_2·6H_2O givingβ-chloro -orβ-iodoamines in high yields（73-99%） within a short time,but 10 mol%of n-Bu_4NBr should be added in the reactions of N-tosylaziridines with NiBr_2·3H_2O in order to obtain the high yields of correspondingβ-bromoamines.Solvent played an important role in the reactions.The proper solvent for the reaction of NiCl_2·6H_2O was DMF,while NiBr_2·3H_2O or NiI_2·6H_2O proceeded well in 1,4-dioxane.
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.
