| 摘要 |
<p>This invention provides a process for preparing 2-(3-aryl-5-isoxazol)benzoyl halide having the formula wherein X and Y are independently selected from the group consisting of hydrogen, halogen, lower alkyl, lower alkoxy, halo-lower-alkyl, phenoxyphenyl and cyano and wherein X1 is a chloro, bromo, fluoro or iodo; which comprises treating 3'-(aryl)-spirocisobenzofuran-l(3H)5'(4'H)-isoxazol! 3-one having the formula wherein X and Y are as previously defined, with an acid halide and water. The compounds obtained are effective as plant growth regulants. The process overcomes the need to convert isoxazolin-5-yl benzoate with N-bromosuccinimide or dichlorodicyanobenzoquinone since isoxazolin-5-yl benzoates are prepared from vinyl benzoates which are difficult to prepare.</p> |
