Sintesis de flavona amigable con el medio ambiente y su efecto sobre la interacción lechuga - áfidos

The search for chemical compounds that are effective for pest control and in turn harmless to human health and the environment is needed. In this work, a simple and environmentally compatible procedure is reported for the preparation of a compound belonging to the phenylpropanoid (flavone) family, through cyclodehydration of 1- (2-hydroxyphenyl) -3-phenyl-1, 3-propanedione under conditions of reduced environmental impact (synthesis in the absence of solvent, catalyzed with recoverable solid acid and using microwave heating and with reduced times), and the evaluation of the growth of a horticultural species (lettuce) by the action of this compound. The percentage of germination of lettuce seeds decreased with 400 and 500 ppm of flavone compared to the control, while from 200 ppm of flavone a lower growth of the seedlings was observed due to the decrease in the length of the hypocotyl. Although no effects were observed by direct contact of flavone on the aphid body, insect repellency could be identified in lettuce discs embedded in 500 ppm flavone.