A novel synthesis of thiophenes from allenic sulfones involving α,β-unsaturated sulfines as intermediates

Article abstract of DOI:10.1016/S0040-4039(00)79399-3

A new method for the synthesis of α,β-unsaturated sulfines by a Peterson alkylidenation of sulfur dioxide is described. The required α-silyl carbanions are generated by heteroconjugate addition of alkyllithium to α-trimethylsitylated allenic sulfones. The