A highly trans and regioselective anionic formal [3 + 2] cycloaddition was achieved with allylic sulfones having an MBH acrylamide backbone under phase transfer organocatalytic conditions giving rise to the formation of unprecedented densely substituted cyclopentene derivatives.
to chemically modify them and efficiently access libraries of these compounds have been goals of the highest priority in the last decades. In this work, a series of sp2–sp3 fragments was synthesized and validated for that purpose, based on their measured physical–chemical properties. Selective C–H cyanation and allylation of these fragments was demonstrated by simple heating in presence of an appropriate