Choline chloride based eutectic solvent for the efficient synthesis of 2-amino-4<i>H</i>-chromen-4-yl phosphonate derivatives via multicomponent reaction under mild conditions
ABSTRACT Synthesis of 2-amino-4H-chromen-4-ylphosphonate derivatives has been accomplished by the one-pot three-component reaction of salicylaldehyde, malononitrile/ethylcyanoacetate and dialkyl phosphites in the presence of reusable deep eutectic solvent (DES) undermildconditions. The advantages of this method are mildreactionconditions, simple work-up procedure, use of DES as a green solvent
摘要 水杨醛、丙二腈/氰基乙酸乙酯和亚磷酸二烷基酯在温和条件下,在可重复使用的低共熔溶剂 (DES) 存在下,通过一锅三组分反应合成了 2-氨基-4H-色烯-4-基膦酸酯衍生物. 该方法的优点是反应条件温和,后处理程序简单,使用 DES 作为绿色溶剂,是制备重要的生物活性含磷化合物的经济方案。图形概要
Simple, Efficient, and Catalyst-Free Synthesis of (2-Amino-4H-1-benzopyran-4-yl)phosphonates in Polyethylene Glycol
Several (2‐amino‐4H‐1‐benzopyran‐4‐yl)phosphonates were efficiently synthesized by employing a multicomponent protocol involving a salicylaldehyde, malononitrile or ethyl cyanoacetate, and a trialkyl phosphite in polyethyleneglycol. The latter could be recovered and re‐used. No additional solvent or catalyst was required. To the best of our knowledge, this is the first report of the one‐pot preparation
通过使用涉及水杨醛,丙二腈或氰基乙酸乙酯的多组分方案以及聚乙二醇中的亚磷酸三烷基酯,可以有效地合成几种(2-氨基-4- H -1-苯并吡喃-4-基)膦酸酯。后者可以回收再利用。不需要额外的溶剂或催化剂。据我们所知,这是一次单罐制备(2-氨基-4 H -1-苯并吡喃-4-基)膦酸二甲酯的报告。
Inorganic base catalyzed synthesis of (2-amino-3-cyano-4H-chromene-4-yl) phosphonate derivatives via multi-component reaction under mild and efficient conditions
Various phosphonate derivatives were synthesized in good to excellent yields by condensation of substituted salicylaldehydes, malononitrile and phosphites using anhydrous LiOH as a catalyst under mild conditions.
5-Hydroxypentylammonium acetate as a reusable ionic liquid catalyzes tandem Knoevenagel-phospha-Michael reaction of aldehydes, malononitrile and phosphites
作者:S. Sobhani、M. Honarmand
DOI:10.1007/s13738-012-0088-1
日期:2012.10
5-Hydroxypentylammonium acetate as a task-specific ionic liquid promotes efficient tandem Knoevenagel-phospha-Michael reaction of phosphite esters with aryl/heteroaryl/alkyl/salicylaldehydes and malonitrile/ethyl cyanoacetate at room temperature in short reaction times. This simple procedure allows a series of β-phosphonomalonates and 4-substituted 2-amino-4H-chromenes with phosphonic acid dialkyl esters to be synthesized in good to high yields in the presence of an ionic liquid for the first time.
Synthesis of 2-Amino-4H-Chromen-4-yl Phosphonats via C-P Bond Formation Catalyzed by Nano-Rods ZnO Under Solvent-Free Condition
作者:Mona Hosseini-Sarvari、Atefeh Roosta
DOI:10.2174/13862073113166660064
日期:2014.1.31
One-pot, three-component reactions of structurally diverse salicylaldehydes with malononitrile (or
ethylcyanoacetate) and diethyl (or dimethyl) phosphate are carried out in the presence of nano-rods ZnO as an efficient
catalyst for the synthesis of biologically interesting 2-amino-4H-chromen-4-yl phosphonate derivatives. The value of this
method lies in its mild and environmentally benign reaction, simple procedure, good yields, and ease of handling.