中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
(2-异丙基-5-甲基苯氧基)-乙酸肼 | 2-isopropyl-5-methylphenoxyacetylhydrazide | 75843-51-5 | C12H18N2O2 | 222.287 |
—— | methyl 2-(2-isopropyl-5-methylphenoxy)acetate | 111304-01-9 | C13H18O3 | 222.284 |
In the present study, different derivatives of thymol (1) viz. hydrazide (2), oxadiazole thiol (3), triazole thione (4), hydrazones (5-7), and β-lactams (8-10) were synthesized. All synthesized compounds were identified and characterized using elemental analysis, UV-Visible, <sup>1</sup>H NMR, <sup>13</sup>C NMR, and IR spectroscopic techniques. Synthesized thymol derivatives were evaluated for antifungal potential against phytopathogenic fungi Fusarium moniliforme, Rhizoctonia solani, and Dreschlera maydis of maize in comparison to recommended standards in terms of percent inhibition and ED50 values. Thymol was more effective as compared to its derivatives against all three tested fungi. Hydrazones (5-7) and β-lactams (8-10), having m-NO<sub>2</sub> substituted phenyl ring (6, 9), were less effective as compared to o-NO<sub>2</sub> and p-NO<sub>2</sub> analogs against F. moniliforme and R. solani, however, the reverse trend was observed against D. maydis. Thymol and its derivatives were also tested for insecticidal activity against stored grain (chickpea) insect Callosobruchus chinensis and various parameters viz. egg laying, adult emergence, and grain damage were recorded and compared. Compounds having oxadiazole thiol (3) and triazole thione (4) moiety showed promising effects against insect C. chinensis.