Polystyrene-supported TBD catalyzed ring-opening of N-tosylaziridines with silylated nucleophiles
作者:Satoru Matsukawa、Takeru Harada、Shiori Yasuda
DOI:10.1039/c2ob25435b
日期:——
Polystyrene-supported TBD (PS-TBD) catalyzes the ring-opening of N-tosylaziridines with silylated nucleophiles to give the corresponding products in high yields. PS-TBD was easily recovered and reused without significant loss of catalytic activity.
Do aziridines require Lewis acids for cleavage with ionic nucleophiles?
作者:Alakesh Bisai、Ghanshyam Pandey、Manoj K Pandey、Vinod K Singh
DOI:10.1016/s0040-4039(03)01414-x
日期:2003.7
variety of activatedaziridines were cleaved by sodium azide and sodium cyanide in aqueous acetonitrile at reflux, in the absence of any Lewisacid, to provide ring-opened products in quantitative yields. However, the reaction was sluggish in the ring opening of unactivated aziridines with sodium azide where the yields could be increased by adding 50 mol% CuCl2·2H2O. The reaction was used to synthesize
Lithium Perchlorate Catalyzed Regioselective Ring Opening of Aziridines with Sodium Azide and Sodium Cyanide
作者:Jhillu S. Yadav、Basi V. Subba Reddy、G. Parimala、P. Venkatram Reddy
DOI:10.1055/s-2002-35216
日期:——
Aziridines react smoothly with sodiumazide and sodium cyanide in the presence of catalytic amount of lithium perchlorate under essentially mild and neutral reaction conditions to afford the corresponding β-azido and β-cyaoamines in high yields with high regioselectivity.
1-Butyl-3-methylimidazolium Tetrafluoroborate ([Bmim]BF4) Ionic Liquid: A Novel and Recyclable Reaction Medium for the Synthesis ofvic-Diamines
作者:J. S. Yadav、B. V. S. Reddy、K. Premalatha
DOI:10.1002/adsc.200303029
日期:2003.8
opening smoothly with various arylamines in 1-butyl-3-methylimidazoliumtetrafluoroborate ([bmim]BF4) or 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim]PF6) ionicliquids under mild and neutral conditions to afford the corresponding vicinal-diamines in excellent yields with high regioselectivity. The recovered activated ionicliquids are recycled for four to five runs with no loss of activity
β-Cyclodextrin catalyzed for the first time a facile ring opening of aziridines with nucleophiles such as aromatic amines and azides in water at room temperature to afford diamines and azidoamines respectively in good yields.