The rutheniumtetroxideoxidation of cyclic N-acyl amines by a 10% NaIO4 aqueous solution containing tert-butanol as a single layer system resulted in the endo-cyclic C–N bond cleavage to afford the ω-amino acids as almost sole products in good yields, while a similar oxidation under the double layer using a NaIO4 aqueous solution, and ethyl acetate gave the N-acyl lactams.
Spirocyclic Amide Acetal Synthesis by [CpRu]‐Catalyzed Condensations of α‐Diazo‐β‐Ketoesters with γ‐Lactams
作者:Romain Pertschi、Elodie Brun、Adiran Aguirre、Laure Guénée、Amalia I. Poblador‐Bahamonde、Jérôme Lacour
DOI:10.1002/hlca.202100122
日期:2021.10
The synthesis of spirocyclic amideacetals (33–93 %) has been achieved through Ru(II)-catalyzed condensations of N-carbamate protected pyrrolidinones with metal carbenes derived from α-diazo-β-ketoesters. Thanks to the mildness of the diazo decomposition conditions induced by a 1 : 1 combination of [CpRu(MeCN)3][BArF] and 1,10-phenanthroline, the formation of the sensitive products is possible. Full