Pyridine derivatives and the N-oxides thereof, and the use thereof as intermediates for the synthesis of plant protecting agents

US4756739A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Andreas Fuss · Berlin, DE
• Volker Koch · Kelkheim, DE

Key dates

• Filing date: Dec 19, 1986
• Grant date: Jul 12, 1988
• Expiry date: Dec 19, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D213/89
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The compounds of the formula I ##STR1## in which A denotes N or N.fwdarw.O, Z denotes O or NH, R denotes H, (halo)alkyl, (halo)alkenyl, (halo)alkynyl or alkoxycarbonyl, R.sup.1 denotes hydrogen, halogen, amino, --NHOH, hydroxyl, (substituted) phenylazo or a radical of the formulae Y=C=N--, Y.sup.1 Y.sup.2 C.dbd.N--, Y.sup.3 NH-- or ##STR2## K denotes 0 or 1, and m and n, independently of one another, denote a number from 1 to 4, with the proviso that, when Z-R denotes OH or NH.sub.2, (R.sup.1).sub.n denotes at least one radical of the formula ##STR3## or represents two radicals, in the 5 or 6 position of the heterocyclic ring, which, in the 5 position, denote halogen and, in the 6 position, denote a radical of the group comprising halogen, amino, hydroxyl or phenylazo, which may be substituted as specified above, are valuable intermediates in the synthesis of plant protection agents.