Ethyl vinylacetate acid chloride method

Fit a reflux condenser and a dropping funnel into the two necks of a 150 ml. Claisen flask and stopper the side arm (compare Fig. Ill, 31, 1) place 50 g. (31 ml.) of redistilled thionyl chloride in the flask. Drop 

Ethyl cyc/opropane-carboxylate. Use 22 g. of cycfopropane-carb-oxylic acid (Section V,33) and 40 g. (24-5 ml.) of redistilled thionyl chloride to prepare the acid chloride, b.p. 118-119° (22 g.). Treat the latter with 10-1 g. of absolute ethyl alcohol. The yield of ethyl cyclo-propane-carboxylate, b.p. 132-133°, is 13 g. 

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