B<sub>2</sub>O<sub>3</sub>/Al<sub>2</sub>O<sub>3</sub> as an Efficient and Recyclable Catalyst for the Synthesis of β-Amino Alcohols under Solvent-Free Conditions
Abstract A convenient and efficient procedure for the solvent-freesynthesis of β-amino alcohols has been achieved via B2O3/Al2O3-promoted highly regioselective ring opening of epoxides with aromatic amines in good to excellent yields at room temperature. Additionally, the catalyst can be recycled without affecting the catalytic property.
Thiourea catalyzed aminolysis of epoxides under solvent free conditions. Electronic control of regioselective ring opening
作者:Swapandeep Singh Chimni、Neeraj Bala、Vaibhav A. Dixit、Prasad V. Bharatam
DOI:10.1016/j.tet.2010.02.053
日期:2010.4
A reactant economizing process for the regioselective aminolysis of epoxides using equimolar quantities of reactants catalyzed by the double hydrogen bond donor N,N'-bis[3,5-bis(trifluoromethyl)phenyl]thiourea is reported. Regioselectivity of the reaction is controlled by the electronic nature of the substituent on the styrene oxide, which has been substantiated on the basis of C-13 NMR data and DFT calculations. (C) 2010 Elsevier Ltd. All rights reserved.