Abstract
An acid-catalyzed pyrrolidine ring opening in 2-(2-hydroxynaphthalen-1-yl)pyrrolidine-1-carboxamides in the presence of resorcinols furnished new calix[4]resorcinols or 1,1-diarylbutanes modified with urea fragments. The process follows the retro-Mannich reaction mechanism, with the 2-naphthol fragment playing the role of the leaving group.
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