Selective Prins Reaction of Styrenes and Formaldehyde Catalyzed by 2,6-Di-tert-butylphenoxy(difluoro)borane
Thorsten Bach*, Johannes Löbel
*Technische Universität München, Lehrstuhl für Organische Chemie I, Lichtenbergstr. 4, 85747 Garching, Germany, Email: thorsten.bachch.tum.de
T. Bach, J. Löbel, Synthesis, 2002, 2521-2526.
A sterically congested Lewis acid was used as catalyst in the Prins reaction of various styrenes and formaldehyde. 4-Aryl-1,3-dioxanes were selectively formed as the exclusive products of the reaction with styrenes and vinylthiophenes with good to excellent yields.
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Prins reaction, carbocations, catalysis, chemoselectivity, electrophilic additions, Lewis acids