申请人:The Dow Chemical Company
公开号:US05158597A1
公开(公告)日:1992-10-27
Dibenzo[d,g][1,3]dioxocin-6-carboxylic acids substituted by methyl or ethyl or a moiety --CH.sub.2 CH.sub.2 -- at the 12-position and optionally substituted at other positions, such as methyl 4'-chlorospiro(cyclopropane-1,12'(12'H)-dibenzo[d,g][1,3]dioxocin)-6'-carb oxylic acid, and their agriculturally acceptable esters, amides, and salts are useful for the control of undesirable vegetation. The 1,1-diarylcyclopropane intermediates required for the spirocyclopropane compounds can be prepared from appropriately substituted 1,1-diarylethene procursors by reaction with phenylthiomethyl lithium reagent.
甲基或乙基或一个基团--CH.sub.2 CH.sub.2 --取代的Dibenzo[d,g][1,3]二噁烷-6-羧酸以及其在其他位置如甲基4'-氯代螺环丙烷-1,12'(12'H)-dibenzo[d,g][1,3]二噁烷)-6'-羧酸中的取代物,以及它们的农业可接受的酯,酰胺和盐对于控制不良的植被是有用的。制备螺环丙烷化合物所需的1,1-二芳基环丙烷中间体可以通过与苯硫甲基锂试剂反应的适当取代的1,1-二芳基乙烯前体制备。