Saturated quaternary ring

From Photocatalytic Ring Opening to Skeletal Reconstruction: Reaction Logic and Synthetic Applications of Oxygen-Atom Replacement in Oxetanes

Oxetanes, azetidines, thietanes, and cyclobutanes are all saturated four-membered rings. Their overall carbon frameworks are similar, with the principal difference lying in the atom or group within the ring that connects the three-carbon fragment. In conventional synthesis, however, replacing ...