The title compound 6 was synthesized from 2,3,5‐tri‐ O ‐benzyl‐ D ‐arabinofuranose ( 7 ) in three steps and 48% overall yield. Moreover, it was shown, in the case of γ‐hydroxy amide 9 , that the Mitsunobu reaction is not suitable for the preparation of γ‐lactams, because O ‐alkylation is predominant.
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Meng et al. (1991) studied this question.
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