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1,3-Dipolar cycloaddition of nitrone 7 to α,β-unsaturated δ-lactones: non-chiral 2, racemic mixture 3/3ent, d-glycero 3 and d-threo 15 proceeds with high stereoselectivity in the case of 2 and 15, and with a significant kinetic resolution in the case of the racemate 3/3ent. The endo approach of reactants was not observed. CD-spectroscopy proved an attractive tool for determination of the absolute...
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