The synthesi of benzo-1,4-dithiafulvenes by a simple treatment of 2-substituted 1,3-bendithiolium tetrafluoroborates - obtained starting from carboxylic acids or acyl chlorides and tetrafluoroboric acid/ether complex - with acetonitrile-water is reported. The reaction is very fast and affords the products in high yiedls and under mild conditions. The reactions of benzo-1,4-dithiafulvenes with reducing agents (zinc/trifluoroacetic acid and acetonitrile, zinc/deuterated trifluoroacetic acid and acetonitrile, Raney nickel) and with oxidizing agents (hydrogen peroxide/acetic acid, sodium hypochloride/chlorine gas water) are reported. These reactions show the interesting synthetic potentizl of benzo-1,4-dithafulvenes.
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