Compounds of formula (I) wherein the substituents are as defined in claim 1, and agronomically acceptable salts/N-oxides/isomers/enantiomers of those compounds are suitable for use as herbicides.
Synthetic Process Development and Scale Up of Palladium-Catalyzed Alkoxycarbonylation of Chloropyridines
作者:Roger Crettaz、Jérôme Waser、Yves Bessard
DOI:10.1021/op010012k
日期:2001.11.1
3-Dichloropyridines undergo a mono- or a dicarbonylation in the presence of carbon monoxide, an alc., and a palladium catalyst, affording selectively either alkyl 3-chloropyridine-2-carboxylates or dialkyl pyridine-2,3-dicarboxylates in good yields, depending on the reaction conditions. For instance, the process could be scaled up for the monoalkoxycarbonylation of 2,3-dichloro-5-(trifluoromethyl)pyridine, affording
Compounds of formula (I) wherein the substituents are as defined in claim
1
, and agronomically acceptable salts/N-oxides/isomers/enantiomers of those compounds are suitable for use as herbicides.