Naoyoshi Maezaki, Mayuko Izumi, Sachiko Yuyama, Chuzo Iwata and Tetsuaki Tanaka
Novel cyclisation via intramolecular α-alkylation of vinylic sulfoxides was studied and cyclic vinylic sulfoxides of various ring sizes (5–7) were synthesised from both (E)- and (Z)-isomers without loss of optical purity.