Ppg Industries, Inc.

William S Grove

Sidney B Richter

This invention concerns certain N-alkyl-N-[3-(alkoxyalkyl)phenyl]-2-haloacetamides having herbicidal activity, their preparation, and the control of weeds therewith.

N-Alkyl-N-[3-(alkoxyalkyl)phenyl]-2-haloacetamide herbicides

This invention provides as new compositions of matter 2,4,5-trichlorophenoxy acetic acid (2,4,5-T) and (2-2,4,5-trichlorophenoxy) propionic acid (Silvex) including the hydrolyzable salts, aliphatic esters and amides of these acids, which compositions are free of chlorinated dibenzo-p-dioxins.

Trichlorophenoxy alkanoic acid free of chlorinated dibenzo-p-dioxins

This invention concerns certain substituted diphenyl ethers having herbicidal activity, their preparation, and the control of weeds therewith.

Substituted diphenyl ethers having herbicidal activity

Trichlorophenoxy alkanoic acid including hydrolyzable salts, aliphatic esters and amides thereof said compounds being free of chlorinated dibenzo-p-dioxins are prepared by liquid phase alkaline condensation of 3-chlorophenol or 3,4-dichlorophenol with an alpha halo alkanoic acid, ester or amide followed by liquid phase chlorination of the condensation product.

Process for preparing trichlorophenoxy alkanoic acid and hydrolyzable

This invention relates to herbicidally active diphenyl ether compounds, herbicidal compositions thereof and the control of weeds therewith, said compounds represented by the formula ##STR1## wherein A is: ##STR2## wherein: X is hydrogen or halogen;

2',5'-Dioxo-1'-pyrrolydinyl 5-(2-halo-4-trifluoromethylphenoxy)-2-halo-,

Disclosed are compounds, for example, methyl N-[5-(2-chloro-4-trifluoromethylphenoxy)-2-nitrobenzoyl]carbamate; the process of making the compounds; and the method of controlling weeds such as yellow foxtail and johnsongrass when growing among crops with the compounds represented by Formula I: ##STR1## wherein X is hydrogen (H), chloro (Cl), or bromo (Br); Z is nitro (NO.sub.2), halogen, or cyano (CN); and R is an alkyl of up to four carbon atoms or ##STR2## where A is halogen, an alkyl of up to three carbon atoms, an alkoxy of up to three carbon atoms, an alkylthio of up to three carbon atoms; cyano (CN), trifluoromethyl (CF.sub.3), nitro (NO.sub.2), or CO.sub.2 R.sup.2, where R.sup.2 is an alkyl of up to four carbon atoms, and n is an integer of 0, 1, 2, or 3.

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Doylestown, OH, United States of America

William S Grove