Kaïss Aouadi

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The title compound, C15H18ClN5O2, crystallizes with two independent mol-ecules (A and B) in the asymmetric unit. In both mol-ecules, the isoxazolidine rings have an envelope conformation with the O atoms at the flap positions. Each mol-ecule has three stereogenic centres with configurations 2(S), 3(S) and 4(R), confirmed by resonant scattering. Their(More)
1,3-Dipolar cycloaddition between a chiral nitrone and N-substituted maleimides afforded unprecedented enantiopure spiro-fused heterocycles in good yields with a high enantio- and diastereoselectivity. The reaction was taking place on the less hindered face of the nitrone. The obtaining heterocycles were screened for their in vitro antioxidant properties(More)
In the title compound, C24H32BrN3O2, the six-membered cyclo-hexane ring adopts a chair conformation and the isoxasolidine ring adopts a twisted conformation. The mol-ecule has five chiral centres and the absolute configuration has been determined in this analysis. The mol-ecular structure is stabilized by weak intra-molecular C-H⋯O and C-H⋯N contacts. In(More)
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