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Auf das Substrat abgestimmt: Chirale Liganden L* und chirale Anionen, wie in (S)‐TriP Ag, wurden in Gold(I)‐katalysierten enantioselektiven intramolekularen Additionen von Hydrazinen und Hydroxylaminen an Allene eingesetzt. Diese komplementären Ansätze ebnen den Weg zu den Titelverbindungen in chiraler Form. PNB=para‐Nitrobenzoyl.
Au‐ff on a trip: Chiral ligands (L*) and chiral anions [(S)‐TriPAg] are employed in the gold(I)‐catalyzed enantioselective intramolecular additions of hydrazines and hydroxylamines to allenes. These complementary methods allow access to chiral vinyl isoxazolidines, oxazines, and differentially protected pyrazolidines. PNB=para‐nitrobenzoyl.
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