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(Wang et al. Synlett 1999, 1, 33) The reaction was carried out following a similar procedure to that described for the preparation of oxazolidinone 8 using n-butyllithium (1.31 M, 9.93 cm3, 13.0 mmol), diisopropylamine (1.82 cm3, 13.0 mmol), oxazolidinone 7 (2.10 g, 8.7 mmol) and allyl bromide (2.25 cm3, 26.0 mmol) to afford oxazolidinone 10 (1.48 g, 60%) as a light orange oil for which the NMR data were in agreement with the literature.