Chemistry on Benzopentathiepin. Reactios of Benzopentathiepin with Aromatic Compounds in the Presence of Lewis Acid

Synthesis of Pentathiepanes and Isolation of the Conformers Based on High Inversion Barrier of the Pentathiepane Ring

“…For instance, an SϪS bond of H (11), and H(12) and hence would not much affect their chemical shift values. Accordingly, the above sizable upfield the benzopentathiepin is cleaved by treatment with Lewis acids [24,25] and that of a trithiolane with sulfuryl chlo-and 18b, in the equilibrium ratio of 58:42 (Scheme 5). The conformers, 18a and 18b, could be separated by HPLC as ride.…”

Synthesis and characterization of new thianthrene-containing polymers

“…One of the few publications dealing with the synthesis of asymmetric thianthrenes describes the reaction of benzopentathiepin (BPT) with alkyl-substituted benzenes in the presence of a Lewis acid 15) . The BPT acts under the given conditions like a 1,2-dicationsynthone (Scheme 7).…”

“…The synthesis of 14 is a very important step towards the preparation of PPVTHV, because it can be converted into 1,4-bis(bromomethyl)thianthrene (15) and finally yields the "precursor" monomer 9 (Scheme 9). At first we tried to polymerize monomer 9 itself to yield the poly(1,4-thianthrenylenevinylene), but we found out that the precursor polymer precipitated from the reaction mixture.…”

“…The preparation of asymmetric-bisubstituted thianthrene is quite difficult, and only very few of such molecules are described in the literature [13][14][15] . The reason for this is that both aromatic rings in the thianthrene are energetically equal and therefore no regioselective reaction towards one ring can be applied.…”

Heteroatom chemistry of cyclic benzopolychalcogenides: Synthesis and characterization

“…Based on the reactivity of benzopentathiepin, many reactions were developed to give many kinds of heterocyclic compounds that included sulfur atoms on the benzene ring, as shown in Scheme 3 [25][26][27][28][29][30][31][32][33]. These successes in the synthesis of cyclic benzopolychalcogenides and related compounds have allowed us to study reactions between the polysulfide ring and a functional group, such as the amino and sulfide groups.…”