Carbanions of 3-chloropropyl phenyl sulfones containing electrophilic groups such as carbonyl and imino groups in the ortho position of the phenyl ring add intramolecularly to these groups to give aldol-type anions. These anions undergo intramolecular 1,5-substitution of chlorine to give tricyclic derivatives of tetrahydrofuran, pyrrolidine, and cyclopentane.