- Carbonylation of 2-chloro-4,6-dimethoxypyrimidine and 2-(chloromethyl)- 4,6-dimethoxypyrimidine
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The preparation of pyrimidine-2-carboxylates and 2-pyrimidineacetates by alkoxycarbonylation of respectively 2-chloropyrimidine and 2- (chloromethyl)pyrimidine with carbon monoxide in the presence of palladium acetate and 1,1'-bis(diphenylphosphino)ferroc
- Bessard, Yves,Crettaz, Roger
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- Process for preparing 2- pyrimidinecarboxylates
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A process for preparing 2-pyrimidinecarboxylates of the general formula: STR1 wherein R is C1-6 -alkyl, C3-6 -cycloalkyl, aryl or arylalkyl, and R1 to R3 are, independently of one another, hydrogen, C1-6 -alkyl, fluorinated C1-6 -alkyl, C1-6 -alkoxy, (C1-6 -alkoxy)-C1-6 -alkyl or (C1-6 -alkoxy)carbonyl. These are obtained from the corresponding 2-halopyrimidine, the corresponding alcohol ROH and carbon monoxide in the presence of a palladium/phosphine complex and a base. 2-pyrimidinecarboxylates are intermediates for preparing herbicides.
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- Heterocyclic N-acylsulfonamides, and their use as herbicides or growth regulators
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Compounds of the formula I or salts thereof STR1 where R1 is H or an aliphatic radical; R2 and R3 are H, alkyl or phenyl; W is O, S, NR4 or NOR4 ; X is CHR2, O or NR4 ; L is a (s
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