Abstract
A series of new 3-substituted isoxazolecarboxamides have been prepared from aldehydes. A key step was a 1,3-dipolar cycloaddition of nitrile oxides to α,β-unsaturated esters. Some of these compounds exhibited high fungicidal activities against Alternaria alternate, Botrytis cinerea, Rhizoctonia solani, Fusarium culmorum, and Phytophthora cactorum.
Keywords: Chlorination, cycloaddition, fungicides, isoxazolecarboxamides, regioselectivity, synthesis, Alternaria alternate, Botrytis cinerea, Rhizoctonia solani, Fusarium culmorum, Phytophthora cactorum, flufenacet, isoxaben, pentanochlor, flutolani, Huisgen method, HRMS, NMR spectra, racemate, ESI mass spectra, Micromass LCT, Flash-chromatography, HMPA
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