Herbicidal 12-substituted 12H-dibenzo[d,g][1,3]dioxocin-6-carbox

Details Herbicidal 12-substituted 12H-dibenzo[d,g][1,3]dioxocin-6-carbox Herbicidal 12-substituted 12H-dibenzo[d,g][1,3]dioxocin-6-carbox

1990-04-12

1991-12-10

Ivy, C. Warren

Chemistry: fertilizers

Processes and products

Forms or conditioning

549349, A01N 4300, C07D32112

Patent

active

050714651

ABSTRACT:
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.

REFERENCES:
patent: 4979978 (1990-12-01), Renga et al.

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