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In this laboratory experiment, students synthesize and investigate the properties of a stable porphyrinogen. Porphyrinogens are an important class of porphyrin precursors as well as important macrocycles for the preparation of coordination compounds. The acid-catalyzed cyclization of pyrrole and acetone uses common, inexpensive reagents to afford the meso-octamethylporphyrinogen in a near-analytical grade in one step, directly from the reaction medium.
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A.J.F.N. Sobral (2005) studied this question.
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