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Pyrroles are an important class of heterocycles which represents not only useful building blocks in natural product synthesis, but also basic structural units in compounds that exhibit remarkable pharmacological activities. 1 One of the most common methods to synthesize pyrroles is the reaction of 2,5-dimehoxytetrahydrofuran with primary amines under acid catalysis, known as Clauson-Kaas reaction. 2

CeCl3·7H2O catalyzed Clauson-Kaas reaction. Synthesis and derivatization of N-Arylpyrroles