Zirconium dodecyl sulfate [Zr(DS) 4 ] is an efficientcatalyst for the aminolysis of epoxides in water at pH 5.0. Epoxides and anilines were used and the corresponding β-amino alcohols were isolated in generally high regioselectivity and excellent yields.
Highly efficient ring opening reactions of epoxides with deactivated aromatic amines catalyzed by heteropoly acids in water
作者:Najmedin Azizi、Mohammad R. Saidi
DOI:10.1016/j.tet.2006.11.045
日期:2007.1
Heteropoly acid was found to be an effective and efficient catalyst for the ring opening reaction of epoxides with various aromatic amines to produce the corresponding β-amino alcohols in moderate to excellent yields in water. This method provides a new and efficient protocol in terms of mild reaction conditions, clean reaction profiles, small quantity of catalyst, and simple work-up procedure.
Graphite oxide as a heterogeneous and recyclable solid acid catalyzed a simple and efficient method for the synthesis of $\beta $-amino alcohols by ring opening of epoxides with amines. This method is effective with various aromatic and aliphatic amines under solvent-free conditions. The corresponding $\beta $-amino alcohols are obtained in high yields (56%-95%) and short reaction times (15-30 min) with high regio- and chemoselectivity under metal-free conditions.
Silica chloride nano particle (nano SiO2‐Cl), has been found to be heterogeneous catalyst for facile, simple and mild ringopening of epoxides with aromatic amines to afford β‐amino alcohols in dry CH2Cl2 at room temperature.
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。