Synthesis of functionalised β-keto amides by aminoacylation/domino fragmentation of β-enamino amides
作者:Pavel Yanev、Plamen Angelov
DOI:10.3762/bjoc.14.238
日期:——
Ethylenediamine-derived β-enamino amides are used as equivalents of amide enolate synthons in C-acylation reactions with N-protected amino acids. Domino fragmentation of the obtained intermediates leads to functionalised β-keto amides, bearing a protected amino group in their side chain.
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.