compounds were prepared and used as catalysts for the Mannich-type reaction of benzaldehyde, aniline, and cyclohexanone in water. Among them, Cs2.5H0.5PW12O40 showed excellent catalytic activity. Effects of surfactant, catalyst loading and temperature were studied to introduce the best reaction condition. The optimized reaction conditions were extended to Mannichreaction of various aldehydes, ketones
制备了一系列Keggin杂多化合物的不溶盐,并将其用作水中苯甲醛,苯胺和环己酮的曼尼希型反应的催化剂。其中,Cs 2.5 H 0.5 PW 12 O 40表现出优异的催化活性。研究了表面活性剂,催化剂负载量和温度的影响,以引入最佳反应条件。优化的反应条件扩展到各种醛,酮和胺在水中的曼尼希反应。这种快速的过程提供了具有主要抗非对映选择性的结构多样化的β-氨基酮。另外,据报道有四种新化合物。回收催化剂并将其再用于后续操作。
A competent pot and atom-efficient synthesis of Betti bases over nanocrystalline MgO involving a modified Mannich type reaction
作者:Bikash Karmakar、Julie Banerji
DOI:10.1016/j.tetlet.2011.07.075
日期:2011.9
A simple, efficient, and eco-friendly method for the synthesis of 1-(alpha-aminoalkyl) naphthols, the Betti bases, has been carried out over a basic nanocrystalline MgO catalyst in aqueous condition. The method has been applied for the synthesis of a range of compounds with variable functionalities in excellent yield and selectivity. (C) 2011 Elsevier Ltd. All rights reserved.
Multicomponent reaction in deep eutectic solvent for synthesis of substituted 1-aminoalkyl-2-naphthols
作者:Najmedin Azizi、Mahtab Edrisi
DOI:10.1007/s11164-016-2628-2
日期:2017.1
One-pot multicomponent synthesis of Betti bases (aminoalkyl naphthols) from aldehydes, β-naphthol, and secondary amines in deepeutecticsolvent (DES) based on urea and choline chloride has been developed. A broad range of aminoalkyl naphthols can be obtained smoothly in good to excellent yield in biodegradable choline-chloride-based deepeutecticsolvent, being compatible with functional groups and