sucrose catalyzes synthesis of 2-amino-4h-chromene: insight to the kinetics

sucrose is applied as an efficient catalyst for the three-component reaction consisting of aromatic aldehydes, malononitrile and resorcinol in a mixture of water and ethanol media as green solvents. the advantages of this method are excellent yeild, inexpensive catalyst and more environmentally friendly. mechanistic insight into the synthesis of 2-amino-4h-chromene included spectral kinetics approaches is revealed. from the temperature, concentration and solvent studies, the activation energy (ea=102 kjmol-1) and the related kinetic parameters (δgǂ=41 kjmol-1, δsǂ=195 jmol-1 and δhǂ=99 kj mol-1) are calculated. the first step of proposed mechanism is recognized as a rate-determining step (k1) and this is confirmed based upon the steady-state approximation.