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ChemicalBook CAS DataBase List 2,4,6-Trichloropyrimidine

2,4,6-Trichloropyrimidine synthesis

9synthesis methods
-

Yield:3764-01-0 90%

Reaction Conditions:

with 1-methyl-pyrrolidin-2-one;anhydrous phosphorus trichloride;chlorine;trichlorophosphate

Steps:

2 Example 2
Example 2 Simultaneous addition 512 g (4 mol) of barbituric acid and 10 g of N-methylpyrrolidone were added to 3500 g (23,2 mol) of phosphorus oxychloride introduced in advance, and the mixture was then heated to 75+/-5° C. After a further stirring time of 7 hours, 1650 g (12.0 mol) of phosphorus trichloride and 840 g (11.8 mol) of chlorine were added and introduced simultaneously. After work-up by distillation, 661 g of 2,4,6trichloropyrimidine were obtained, corresponding to a yield of 90% of theory.

References:

Bayer Aktiengesellschaft US5898073, 1999, A

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