A practical and highly efficient protocol for multicomponent synthesis of β-phosphonomalononitriles and 2-amino-4H-chromen-4-yl phosphonates using diethylamine as a novel organocatalyst
has been demonstrated for the first time to be a highly efficient organocatalyst in the solvent-free synthesis of β-phosphonomalononitriles by a three component condensation of aldehyde, malononitrile and dialkyl phosphite at ambient temperature. The applicability of the same catalyst in the synthesis of diethyl (2-amino-3-cyano-chromene-4-yl) phosphonic acid esters has also been described.
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.
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
one-pot three-component synthesis of structurally diverse dialkyl 2-amino-3-cyano-4H-chromen-4-ylphosphonates from the condensation of salicylaldehydes, malononitrile, and trialkyl phosphite using silver nanoparticles as catalyst in ethanol at reflux has been developed. Selected new compounds were evaluated for their antioxidant activity by freeradical screening using 2,2-diphenyl-1-picrylhydrazyl (DPPH)
An efficient multi-component synthesis of (2-amino-3-cyano-4H-chromen-4-yl) phosphonic acid diethyl ester
作者:D.S. Gaikwad、K.A. Undale、T.S. Shaikh、D.M. Pore
DOI:10.1016/j.crci.2011.03.001
日期:2011.10
Résumé (2-Amino-3-cyano-4H-chromen-4-yl) phosphonic acid diethyl esters are prepared via a single-step multi-component reaction of structurally diverse salicylaldehydes with malononitrile and triethyl phosphite using a catalytic amount of potassium phosphate in ethanol at ambient temperature. Use of potassium phosphate as an inexpensive catalyst makes the protocol more economical. Mild reaction conditions, simple work-up procedure are the added advantages of the present method.