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Report | Regular issue | Vol 23, No. 2, 1985, pp.345-348
Published online, 1st January, 1970
DOI: 10.3987/R-1985-02-0345
Synthses of Benzoylpiperazine Diones from Their Benzyl Counterparts

Michel Barbier*

*Institut des Chimie des Substances Naturelles, C.N.R.S., 1 avenue de la Terrasse, Bat. 27, 91198 Gif-sur-Yvette Cedex, France


The first synthesis of 2,5-dibenzoylpiperazine-3,6-diones through a selective FeCl3-H2O-UV promoted photooxidation of the corresponding benzyl methylene groups is reported.This reaction has been also applied to NN’-dibenzylpiperazine-2,5-dione and to a p-methoxy-beneyl-substituted hydantoin chosen as a model, resulting in the expected product. By modifying the experimental conditions, the unsymetrically substituted benzyl-benzoyl derivatives may be obtained.