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.
Dual basic ionic liquid as a catalyst for synthesis of (2-amino-3-cyano-4H-chromen-4-yl) phosphonic acid diethyl ester and its molecular docking study
作者:D. S. Gaikwad、K. A. Undale、A. A. Patravale、P. B. Choudhari
DOI:10.1007/s11164-019-03981-3
日期:2020.1
Abstract A series of (2-amino-3-cyano-4 H -chromen-4-yl) phosphonic acid diethyl ester derivatives were synthesized from salicylaldehyde, malononitrile and triethylphosphite in ethanol/water (1:1) system using a new dual basic ionic liquid, i.e., 1-[3-(dimethylamino)propyl]-1,4-diazabicyclo[2.2.2]octan-1-ium hydroxide at ambient temperature. The attractive features of this protocol are higher yields
A one-pot synthesis of new (2-amino-3-cyano-4H-chromen-4-yl) phosphonic acid diethyl ester was achieved in good yields by indium trichloride catalyzed three-component reaction of salicylaldehyde and malononitrile with triethyl phosphite.