Abstract
Ethyl 2- and 5-cyclopropylfuran-3-carboxylates react with the system comprising Paraform, hydrogen chloride, and zinc chloride to form chloromethyl derivatives. This process is accompanied by selective cleavage of the cyclopropane ring, leading to appearance of a γ-chloropropyl fragment. Phosphorylation of the resulting halides with sodium diethyl phosphite in benzene involves exclusively the chloromethyl group.
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