May-Jun 1993 Preparation of 4-Substituted l,3-Oxathiolan-5-ones via the Sulphenium Ion Intermediate Generated by the Pummerer Rearrangement JV Frechina, P. Palanca, T. Picher and V. Sanz* Departamento de Química Orgànica, Universität de Valencia, Dr. Moliner, 50, 46100 Burjassot, Valencia, Spain > JA Ramirez Departamento de Química Inorgànica, Universität de Valencia, Dr. Moliner, 50, 46100 Burjassot, Valencia, Spain Received December 2, 1992 ...