Morak, B.Pluta, K.Suwinska, K.Grymel, M.Besnard, C.Schiltz, M.Kloc, C.Siegrist, T.2006-03-292006-03-292006-03-29200510.3987/COM-05-10491https://infoscience.epfl.ch/handle/20.500.14299/229031WOS:0002333253000057624Synthesis, properties and reactions of two isomeric dipyrido-1,4-dithiins of the C-2h and C-2v symmetry are described. Their structure detennination and identification are based on spectroscopic methods (H-1 and C-13 NMR, HETCOR, gHMBC and MS), physical properties (mp and R-f), the 1,4-dithiin ring opening reactions and finally X-Ray analysis. A very unusual type of the Smiles rearrangement (S -> S, the pyridyl group migrates from one sulfur atom to another) during the 1,4-dithiin ring opening with sodium methanethiolate enabling isomerization of dithiin with the C-2h symmetry to dithiin with the C-2v symmetry is found.text::journal::journal article::research article