Summary
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1.
Two methods were developed for the synthesis of the previously unknown alkenyl 2-chlorovinyl ketones. The first method consists in the condensation of acid chlorides, of α,β-unsaturated acids with acetylene in presence of aluminum chloride.The second method consists in the condensation of acid chlorides of a- and β-chloro acids with acetylene in presence of aluminum chloride and subsequent treatment of the reaction product with diethylaniline.
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2.
It was shown that alkenyl 2-chlorovinyl ketones react with 2-naphthol in presence of ferric chloride with formation of 3-(1-alkenyl)naphtho[2,1-b]pyrilium chloroferrates. This indicates the high mobility of chlorine in the alkenyl 2-chlorovinyl ketone molecule and proves the structure of these compounds.
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