An efficient method for the synthesis of β-nitro alcohols from nitro alkanes and aldehydes in aqueous phosphate buffer under neutral pH conditions at room temperature is reported. In the case of higher nitro alkanes, the reaction showed very good diastereoselectivity to give syn β-nitro alcohols in preference to their anti products.
Nitroaldol-reaction of aldehydes in the presence of non-activated Mg:Al 2:1 hydrotalcite; a possible new mechanism for the formation of 2-aryl-1,3-dinitropropanes
Commercially available, non-activated 2:1 Mg:Al hydrotalcite catalyzes the nitroaldol reaction between a variety of aromatic and aliphatic aldehydes and simple nitroalkanes such as nitromethane and nitroethane. A new mechanism is proposed for the formation of the 1,3-dinitropropanes. The threo/erythro diastereoselectivity of the nitroethane-adducts was determined by 1H NMR spectroscopy and was found
Highly efficient nanosized mesoporous CuMgAl ternary oxide catalysts are provided.
提供高效的纳米级介孔CuMgAl三元氧化物催化剂。
Choline chloride based eutectic solvents: Magical catalytic system for carbon–carbon bond formation in the rapid synthesis of β-hydroxy functionalized derivatives
Significant beta-hydroxy functionalized derivatives including nitroaldols, beta-hydroxy nitriles and beta-hydroxy carboxylic acids were successfully prepared, for the first time, by catalytic use of deep eutectic solvents (DES). This paper explores the versatility and effectiveness of DES as catalyst in three different carbon-carbon bond formation reactions. The uniqueness of this catalyst lies in its simplicity since it avoids expensive catalysts and multi-step synthesis as reported in literature. The compounds, which are potent intermediates for innumerable useful products, were synthesized in excellent yields within very short reaction times. The catalyst prepared from choline chloride and urea, is biodegradable, non-toxic, cost-effective and recyclable. (C) 2012 Elsevier B.V. All rights reserved.
Boileau, Bulletin de la Societe Chimique de France, 1953, p. 1007