Regioselective C-alkylation of alkyl 4-hydroxy-2-methylthiophene-3-carboxylates with α-halo ketonesстатья
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Дата последнего поиска статьи во внешних источниках: 2 сентября 2014 г.
Аннотация:Regioselective C- or O-alkylation of alkyl 4-hydroxy-2-methylthiophene-3-carboxylates with α-halo ketones is possible, depending on the solvent nature. A convenient preparative method of C-alkylation was proposed and previously not easily accessible β-hydroxythiophene derivatives were synthesized.