Preparation and etherification reaction of fatty dichlorocyclopropanes

Dichlorocarbene was added tocis‐9‐octadecene, methyl oleate, methyl elaidate, and methyl linoleate to form the corresponding mono‐ or bis‐dichlorocyclopropanes in yields of 75舑88%. The dichlorocyclopropanes underwent ring‐opening substitution on heating with alcohols (or water) to form ॆ‐chlorallylic ethers (or alcohols). The ethers were obtained in yields of 46 to 84%. Tetraethylene glycol and methyl lactate, as hydroxyl compounds, gave a polyethenoxy ester and an ether‐linked diester, respectively.