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ChemicalBook CAS DataBase List MECOPROP-P
16484-77-8

MECOPROP-P synthesis

2synthesis methods
Starting from racemic α-chloropropionic acid, non-diastereomeric salts are formed with (1-naphthyl)ethylamine, a chiral amine. Stepwise crystallization is applied to resolve the salts to obtain (R)-α-chloropropionate. The salt is hydrolyzed with 3 mol/L aqueous sodium hydroxide solution to yield (R)-α-chloropropionic acid. Subsequently, this product undergoes a condensation reaction with 2-methyl-4-chlorophenol in an aqueous sodium hydroxide system at 90°C and a pressure of 0.25×10⁵ Pa for 25 hours, generating the salt of the target product. Finally, through acidification, extraction and recrystallization purification, Mecoprop-P with an optical purity of 95.9% and a yield of 97% is obtained.

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