VERFAHREN ZUR HERSTELLUNG VON TRIFLUOROMETHYLPYRIDIL(OXY/THIO)PHENOXYPROPION-VERBINDUNGEN, INSBESONDERS WIRKSAM WIE HERBIZIDE.

摘要

A trifluoromethylpyridyl (oxy/thio) phenoxypropionic compound corresponding to the formula …… wherein T is oxygen or sulfur;… X is C1, Br, or CF3;… Y is H, C1, Br, or CF3, provided at least one of X and Y is CF3;… Z is -C-OR, -CNR1R2, -C-O<(-)>M<(+)>, -CN, -CH2OR3, -CH2OCR4, or -CSR5;… M is <(+)>NHR1R1R1, Na, K, Mg, or Ca;… R is H, C1-8 alkyl, benzyl, chlorobenzyl, or C3-6 alkoxyalkyl;… R1 is H, C1-4 alkyl, or C2-3 hydoxyalkyl;… R2 is R1 or -OCH3;… R3 is H or c1-4 alkyl;… R4 is C1-7 alkyl; and… R5 is C1-4 alkyl. …Preparation starting from a trichloromethyl substituted pyridine. …The compounds are useful as herbicides, particularly for control of grassy weeds.