2,3-Dimethyl-1,3-butadiene → [2-(3-Bromo-benzoyl)-4,5-dimethyl-cyclohexa-1,4-dienyl]-methoxyimino-acetic acid methyl ester

Beteiligte Stoffe

Reaktionsschritte

1.5 ml of 2,3-dimethylbuta-1,3-diene are added to the solution of 300 mg 5-(3-bromo-phenyl)-2-methoxyimino-5-oxo-pent-3-ynoic acid methyl ester in 1 ml toluene. The reaction mixture is heated for 24 hours at 130° in an autoclave. It is subsequently evaporated, stirred with petrol ether and filtered with suction. The filtrate is evaporated to give 300 mg of [2-(3- bromo-benzoyl)-4,5-dimethyl-cyclohexa-1,4-dienyl]-methoxyimino-acetic acid methyl ester as a resinous oil.

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