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DOI: 10.1055/s-0030-1258478
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
Publication History
Publication Date:
16 March 2011 (online)

Abstract
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.
Key words
copper - cyclization - elimination - lactams - radical reaction
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A small configuration reversal, unexploitable in practical terms, operated at C3 by MeONa during the functional rearrangement of 3-chloro-4-(chloromethyl)-1-(pyridinyl)- and -1-[(2-pyrimidyl)methyl]pyrrolidin-2-one in MeONa/MeOH.8a