Bismuth(III) trifluoromethanesulfonate and trifluoroacetate as convenient and efficient catalysts for regio- and chemoselective ring opening of epoxides in reactions with anilines
Bismuth(III) trifluoromethanesulfonate and trifluoroacetate as convenient and efficient catalysts for regio- and chemoselective ring opening of epoxides in reactions with anilines
作者:A. R. Khosropour、M. M. Khodaei、K. Ghozati
DOI:10.1007/s11178-005-0016-2
日期:2004.9
Bismuth(III) trifluoromethanesulfonate and trifluoroacetate are highly efficient and practical catalysts for oxirane ring opening in reactions of epoxides with substituted anilines. The reactions are characterized by high chemoselectivity and good to excellent yields of the products.
Bi(OTf)<sub>3</sub>- and Bi(TFA)<sub>3</sub>-Catalyzed Ring Opening of Epoxides with Anilines under Microwave Irradiation
作者:Ahmad R. Khosropour、Mohammad M. Khodaei、Kazem Ghozati
DOI:10.1246/cl.2004.304
日期:2004.3
A facile and environmentally friendly methodology for ring opening of epoxides with anilines has been developed in the presence of catalytic amounts of bismuth (III) triflate or bismuth (III) trifluoroacetate using microwave-assisted heating. The ease of this procedure allowed preparation of the β-aminoalcohols quickly and efficiently.
A powerful, practical and chemoselective synthesis of 2-anilinoalkanols catalyzed by Bi(TFA)3 or Bi(OTf)3 in the presence of molten TBAB
作者:Mohammd M. Khodaei、Ahmad R. Khosropour、Kazem Ghozati
DOI:10.1016/j.tetlet.2004.02.139
日期:2004.4
A facile and efficient synthesis of β-amino alcohols by ring opening of epoxides with anilines in good to excellent yields in the presence of catalyticamounts of Bi(TFA)3 or Bi(OTf)3 via the use of molten tetrabutylammonium bromide (TBAB) as an ionic liquid is described. In addition, the observed chemoselectivity can be considered as a noteworthy advantage of this method.
Hβ zeolite: An Efficient and Reusable Catalyst for Ring-Opening of Epoxides with Amines Under Microwave Irradiation
作者:Rukhsana I. Kureshy、Santosh Agrawal、Manish Kumar、Noor-ul H. Khan、Sayed H. R. Abdi、Hari C. Bajaj
DOI:10.1007/s10562-009-0237-z
日期:2010.2
A solvent-free protocol for the synthesis of beta-amino alcohols (Yield, up to 94%) is demonstrated by the ring-opening reactions of meso and terminal epoxides with aromatic amines using H beta zeolite as catalyst under microwave irradiation. The catalytic system is 80 times faster than the reaction conducted at RT with six times catalyst recyclability.