WebThe lateral fusion of pyrroles with 1,4-dithiins has led to not only retained key features of a dithiin, but also enhanced redox-activity with increased susceptibility to radical cations via redox or chemical oxidation. Stabilization of their radicals are observed for the N,N-tert-butyl or N,N-triphenylmethyl PD as evidenced by ESR measurements. WebThe electrochemical oxidation of 2,5-diaryl-1,4-dithiins (50) has been studied using various voltametric techniques and all compounds were found to undergo quasi-reversible one-electron transfers to the radical cations and dications.126 The first formal redox potential and the lifetime of the radical cation were found to decrease with ...
Synthesis, Electrochemistry, and Gas-Phase Photoelectron …
WebSynthesis of m-dithiins from acetylenic esters, aromatic aldehydes and hydrogen sulphide is described. The thermal rearrangement of dimethyl 2,4-diphenyl-m-dithiin-5,6-dicarboxylate 5 to the isomeric dihydro-o-dithiin 11 is reported. Structural evidence is presented and mass spectral fragmentations are discussed. WebFeb 2, 2024 · The reactivity is compared to and put into context with more common synthetic building blocks, such as 1,3-dithianes and (hetero)aromatic building blocks. 1,4-Dithianes have as yet not been investigated to the same extent as their well-known 1,3-dithiane counterparts, but they do offer attractive transformations that can find good use in the ... tinder wont send me a verification code
Syntheses of polycyclic-1,4-dithiines and related heterocycles
WebJan 1, 2024 · The chemistry of fully unsaturated 1,4-dithiins have received a good deal of attention in synthesis [19] [20][21][22][23], in particular as these heterocycles constitute non-aromatic (and non ... WebFeb 5, 2007 · A novel access to 1,4-dithiins and 1,4-benzodithiins from the corresponding ketones in one-pot using the recyclable reagent, 1,1′-(ethane-1,2-diyl)dipyridinium bistribromide (EDPBT) is described. This method is mild, simple, environmentally benign and is applied successfully for the ring expansion of 1,3-dithiolane to 1,4-dithiins and the ... WebFused aromatic and heterocyclic 1,2,3,4,5-pentathiepins react with triphenylphosphine and alkynes bearing electron-withdrawing groups to give the corresponding 1,4-dithiins in high yields. Unsymmetrical alkynes add regioselectively to afford products in agreement with the electron distribution in a proposed reaction intermediate. A mechanism for these … tinder won\u0027t let me create an account