Fe(III) substituted Wells–Dawson type polyoxometalate: An efficient catalyst for ring opening of epoxides with aromatic amines
作者:N. Aramesh、B. Yadollahi、V. Mirkhani
DOI:10.1016/j.inoche.2012.11.005
日期:2013.2
Abstract Various β -aminoalcohols were prepared by the ring opening reaction of epoxides with aromatic amines in the presence of Fe(III) substituted Wells–Dawson type polyoxometalate, α 2 -[(n-C 4 H 9 ) 4 N] 7 P 2 W 17 FeO 61 ·3H 2 O, as an efficient catalyst. The reaction was performed under neutral condition at room temperature and afforded the corresponding products in high to excellent yields.
摘要 在 Fe(III) 取代的 Wells-Dawson 型多金属氧酸盐 α 2 -[(nC 4 H 9 ) 4 N] 7 P 2 W 17 存在下,通过环氧化物与芳香胺的开环反应制备了各种 β-氨基醇。 FeO 61 ·3H 2 O,作为一种高效的催化剂。该反应在室温下中性条件下进行,并以高产率至极好的收率提供相应的产物。
Sn(OTf)2 catalysed regioselective styrene oxide ring opening with aromatic amines
作者:Gabriela Mancilla、Marienca Femenía-Ríos、Antonio J. Macías-Sánchez、Isidro G. Collado
DOI:10.1016/j.tet.2008.09.099
日期:2008.12
Sn(OTf)2 is an efficient and versatile catalyst for the highly regioselective opening of styreneoxide with aromatic amines, which allowed for the preparation of fourteen 2-arylamino-2-phenylethanols, some of them described here for the first time (6g, 6i, 6j, 6k and 6m). Sn(OTf)2 also catalyses the opening of styreneoxide with aliphatic amines in moderate to high yields but with a lower degree of regioselectivity
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.
guest molecule. β-Cyclodextrin catalyzes chemical reactions by supramolecular catalysis with high efficiency. No investi-gations of ringopening of epoxides with aromatic amines in the presence of β-cyclodextrin in water have been reported. Our earlier study on ester hydrolysis successfully catalyzed by β-cyclodextrin derivatives [21-23] promoted us Highly Effective Opening of Epoxides with Aromatic Amines
A transition metal-free facile access to β-amino alcohols via epoxide ring-opening with amine nucleophiles. The process is carried out at room temperature with only 0.5 mol % catalyst loading. A wide spectrum of styrene oxide and aniline derivatives are readily tolerated by this procedure. A highly effective gram-scale synthesis with a high TON=842 is also reported.