Dec. 1976 Notes 1321 Isothiazoles Vili: Isothiazolidin-3-one Derivatives ED Weiler, GA Miller, and M. Hausman Research Division, Rohm and Haas Company, Spring House, Pennsylvania 19477 Received June 14, 1976 Useful procedures for preparing novel 4-methyl-4,5,5-triehloroisothiazolidin -3-ones and 4,4,5,5-tetrachloroisothiazolidin-3-ones are reported. J. Heterocyclic Chem., 13, 1321 (1976). In previous papers we described the chlorine induced cyclization of 3,3 ...