A Facile Synthesis of 3-Formyl-3-cephem Dimethyl Acetal: Reaction of 3-Chloromethyl-3-cephem with Sodium Iodide - Koyama, Yoshiyuki; Huang, Shyh-Pyng; Ikeda, Daishiro; Kondo, Shinichi (Synlett, 1990)