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A wide range of five‐ and six‐membered sultams bearing an α‐ethoxycarbonyl‐α‐methyl substituent or an α‐aryl group (17 examples) were synthesized by the cyclodialkylation of α‐substituted methanesulfonanilides with α,ω‐dihaloalkanes in the presence of K2CO3 or under phase‐transfer catalysis (PTC) conditions. Upon treatment with K2CO3 in N,N‐dimethylformamide (DMF) or NaH in dimethyl sulfoxide (DMSO),...
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