Herbicidal isoxazolyl imidazolidinones are prepared by reaction of an isoxazolyl-allylurea with ozone and reduction. The process comprises preparing an isoxazolyl imidazolidone of the formula
wherein R is C3-C6 branched alkyl or C1-C6 haloalkyl having 1-3 halo atoms; R1 is C1-C4 alkyl ;
comprising reacting with ozone an isoxazolylurea of the formula
wherein R2 and R3 independently represent hydrogen, phenyl, benzyl or C1-C7 alkyl; and reducing the resulting oxidized intermediate.
通过
异噁唑基烯丙基
脲与
臭氧反应并还原,制备具有除草作用的
异噁唑基
咪唑烷酮。 该工艺包括制备式中 R 为 C3-C6 支链烷基或具有 1-3 个卤原子的 C1-C6 卤代烷基的
异噁唑基
咪唑烷酮;R1 为 C1-C4 烷基;包括使式中 R2 和 R3 独立代表氢、苯基、苄基或 C1-C7 烷基的
异噁唑基
脲与
臭氧反应;以及还原生成的氧化中间体。