PRODUCTION METHOD OF ETHYL(2E, 4E)-5-CHLOROPENTA-2,4-DIENOATE Russian patent published in 2017 - IPC C07C69/587 C07C67/347 

FIELD: chemistry.

SUBSTANCE: invention relates to the production method of ethyl(2E,4E)-5-chloropenta-2.4-dienoate. Ethyl(2E,4E)-5-chloropenta-2.4-dienoate is the prospective starting compound in the synthesis of (2E,4E)-dienoic acids and its derivatives. The results of the invention can be used in chemistry, fine organic synthesis and low-tonnage chemical industry. The production method of ethyl(2E,4E) -5-chloropenta-2.4-dienoate is based on the olefination of (2E)-3-chloroprop-2-enal, where the product is formed by the single-reactor oxidation of (2E)-3-chloroprop-2-en-1-ol with barium manganate (BaMnO₄) to (2E)-3-chloroprop-2-enal, with further olefination of the latter (carbethoxymethylene) triphenylphosphorane in dichloromethane at the room temperature within 20 hours. The invention target is to provide more efficient, simple and safe process of production ethyl(2E,4E)-5-chloropenta-2.4-dienoate with higher yield.

EFFECT: higher product yield, efficiency, safety and procedure simplicity, due to the lack of need to use, produced with low-yield, uncomfortable and dangerous to handle pure compound.

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