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US 11,697,641 B2Granted
Impact of trace elements in the Grignard reaction
AssigneeBASF SE
InventorsJoerg Baeuchle, Wolfgang Wiesenhoefer
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Abstract
The present invention relates to an improved process for preparing 2,4-dichloro-6-(4-methoxyphenyl)-1,3,5-triazine (DICAT) comprising reacting 4-bromoanisole with magnesium, and reacting the resulting Grignard reagent with cyanuric chloride, wherein the magnesium comprises additional metals as impurities in an amount of less than 0.027% by weight, based on the total weight of the magnesium.
Claims17
A process for preparing a compound of formula I
- comprising the steps of
- (i) reacting 4-bromoanisole with magnesium to obtain a Grignard reagent;
- and
- (ii) reacting the Grignard reagent obtained in step (i) with a compound of formula (II)
- wherein the magnesium of step (i) comprises additional metals as impurities in an amount of less than 0.027% by weight, based on the total weight of the magnesium.
2 more elements
Dependencies are inferred from the claim text.