In situ generation of 4π-sulphinylaminomethanide species from WXY–ZH systems and their cycloaddition reactions
Abstract
Sulphonyl group transfer from N-sulphonylaniline to α-amino acids and α-amino acids esters in solution at 25–110 °C gives rise to 4π-electron species believed to be sulphinylaminomethanide anions which can be trapped in good yield by N-substituted maleimides in 4π+ 2π cycloadditions.