... (1) The chemistry of 1,2,3-thiadiazoles has recently been reviewed; see: Thomas, EW In Comprehensive Heterocyclic Chemistry; Potts, KT, Volume Ed ... (b) Green, T. W. Protectrue Groups in Organic Syntheses; Wiley ... Page 2. 4076 J. Org. Chem., Vol. 51, No. 21, 1986 Notes ...