Herbicidal 12-substituted 12H-dibenzo[d,g]dioxocin-6-carboxylic

Details Herbicidal 12-substituted 12H-dibenzo[d,g]dioxocin-6-carboxylic Herbicidal 12-substituted 12H-dibenzo[d,g]dioxocin-6-carboxylic

1990-09-21

1992-10-27

Ivy, C. Warren

Chemistry: fertilizers

Processes and products

Forms or conditioning

549336, 549339, 549340, 549349, A01N 4300

Patent

active

051585979

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: 3553234 (1971-01-01), Johnson et al.
patent: 3836543 (1974-09-01), Grisar
patent: 3931173 (1976-01-01), Parker et al.
J. M. Grisar, et al. J. Medicinal Chemistry, 15, 1273-1278 (1972).
H. Linser, Chemical Abstracts, 53, 20313f, 1959.
J. L. Fults et al., Chemical Abstracts, 42, 1013f&g, 1948.

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