Synthesis and Insecticidal activity microcarpalide

Stereoselective approach for the synthesis of both enantiomers of bio-active decanolactone microcarpalide is described from L-tartaric acid. The synthesis of the key intermediates en route tothe natural product is achieved from L-tartaric acid involving the elaboration of g-hydroxy amidederived from tartaric acid and ring opening of an epoxide derived from tartaric acid. A simplemethod for the synthesis of microcarpalide derivatives has been developed in the presence ofBF3.SiO2, and Insecticidal activity of these compounds against Spodoptera litura was observed to be comparable to commercial pyrethroid insecticide, cypermethrin. The structure of the isolated compounds has been determined by means of 1H/13C NMR and FT-IR spectroscopy. This methodhave some advantages such as good to excellent yield, mild reaction condition, ease of operation and workup, high product purity and green process. Spodoptera litura is a serious pest causing enormous losses to many economically important cultivated crops such as cotton, soybean, groundnut, tobacco and vegetables. Sometimes it has been found to cause 26–100% yield loss in the field. Its control hasdepended mostly on application of various insecticides. As a result, many field populations of this pest have developed multiple resistances and field control failure has been observed very frequently

کلیدواژه ها:

component ، Synthesis ، Insecticidal activity ، benzylamino coumarin derivative ، Spodoptera litura