Catalytic production of sulfur heterocycles (dihydrobenzodithiins): a new application of ligand-based alkene reactivity

摘要

Activation of bis-o-phenylene tetrasulfide to render it a practical benzodithiete equivalent for [4 + 2] cycloadditions with alkenes has been achieved with catalytic amounts of Mo(tfd)_2(bdt) (tfd = S_2C_2(CF_3)_2; bdt = S_2C_6H_4). Substituted 2,3-dihydro-1,4-benzodithiins are produced.