Synthesis of possible potent herbicidal organic compounds using green catalysts
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Date
2019
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CCSHAU
Abstract
Every day there is a new invention in the field of chemistry but the people are curious about how much they are benign to us. Green chemistry serves as a tool to reshape the chemical processes to make them clean. Thus, green chemistry is the future chemistry which is simple, efficient and benign in all steps of particular synthesis processes. Coumarins, Imidazoles and Dihydropyrimidinones are versatile classes of heterocycles and intermediates for the preparation of other organic compounds due to their effective biological activities. For the preparation of these compounds and their derivatives, different reagents are being used which are quite hazardous to the environment and human health due to their toxic nature. Since last few years, attempts are being made for ecofriendly synthesis by using a green catalyst. Green catalyst is a megahit catalyst which is helpful to overcome the negative environmental effects due to various hazardous and toxic chemicals used in synthetic pathways. Hence, the most important aspect of green chemistry is the use of green catalysts in chemical reactions. Therefore an attempt has been made to synthesize above mentioned classes of compounds by using various green catalyst (Potassium dihydrogen phosphate, Oxalic acid, Citrus limetta juice, Pineapple juice and Lemon juice). These compounds were characterized by spectroscopic technique viz. 1HNMR, IR, Elemental analysis and other analytical data. Synthesized compounds were screened for herbicidal activity at 50, 100, 150 and 200 g/mL concentrations. Compounds 11, 28 and 40 were found more active against the root and shoot of Raphanus sativus L.due to the presence of methyl, chloro and methoxy group (electron-donating groups) as substituents respectively.
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