ChemInform Abstract: Synthesis of 4-Methylene-2-(1-nitromethylidene)-1,3-dithiolane and 4-Methyl-2-(1-nitromethylidene)-1,3-dithiole from Dipotassium 2-Nitro-1,1-ethylenedithiolate

The reaction of dipotassium 2-nitro-1,1-ethylenedithiolate 1 with propargyl bromide has provided isomeric 4-methylene-2-(1-nitroinethylidene)-1,3-dithiolane 4 and 4-methyl-2-(1-nitroincthylidene)-1,3-dithiole 6 via novel monoalkylation-cyclization.