Synthesis of 3-Alkyl-4-(chloromethyl)-1-RSO2-1H-pyrrol-2(5H)-ones, Using a Sequential ATRC/[1,2]-Elimination, from 2,2-Dichloro-N-(2-chloroallyl)-N-RSO2-amides
The preparation of 3-alkyl-4-(chloromethyl)-1-RSO2-1H-pyrrol-2(5H)-ones was efficiently accomplished through a [1,2]-elimination of γ-lactams derived from the copper(I)-catalysed ATRC of 2,2-dichloro-N-(2-chloroallyl)-N-RSO2-amides. The two reactions can be integrated into a sequential one-pot process. copper - cyclization - elimination - lactams - radical reaction