The behavior in solution of the dicyanoaurate anion in the presence of other metal centers has so far been little explored, despite its importance in material science. The design and synthesis of systems with controlled coordination behavior, using chelating ligands and ZnII, has allowed us to detect self-assembly and oligomerization in solution. This phenomenon has been studied with 13C and 1H NMR
Anomeric Stereoauxiliary Cleavage of the C−N Bond of
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‐Glucosamine for the Preparation of Imidazo[1,5‐a]pyridines
作者:Kui Zeng、Jin Ye、Xintong Meng、Sebastian Dechert、Martin Simon、Shuaiyu Gong、Ricardo A. Mata、Kai Zhang
DOI:10.1002/chem.202200648
日期:2022.5.19
An α-anomeric stereoauxiliary strategy for the targeted cleavage of C−N bonds in d-glucosamine was achieved through a seven-membered ring transition-state intermediate and the simultaneous incorporation of amine moieties in imidazo[1,5-a]pyridines. This method provides a novel strategy for the C−Nbondcleavage and unlocks efficient access to diverse imidazo[1,5-a]pyridines blocks bearing versatile