ausblenden:
Schlagwörter:
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Zusammenfassung:
N,N-Dibenzlamino aldehydes, readily accessible from amino acids, can be converted into λ-N,N-dibenzylamino α,β-didehydro amino acid esters without racemization; these undergo stereoselective Diels-Alder reactions and 1,3-dipolar cycloaddition with diazomethane, the sense of diastereoselectivity being opposite to that predicted by the conventional principle of 1,3-allylic strain
