Synthetic fermentation of β-peptide macrocycles by thiadiazole-forming ring-closing reactions
作者:Jonathan G. Hubert、Iain A. Stepek、Hidetoshi Noda、Jeffrey W. Bode
DOI:10.1039/c7sc05057g
日期:——
thiadiazole-forming cyclization reaction between an α-ketoacid and a thiohydrazide. The linear β-peptide precursors were assembled from isoxazolidine monomers by α-ketoacid-hydroxylamine (KAHA) ligations with a bifunctional initiator – a process we have termed ‘synthetic fermentation’ due to the analogy of producing natural product-like molecules from simpler building blocks. The linear synthetic fermentation products
1, 3, 4-Thiadiazol-5-ylacetic, propionic, and glutaric acids (3-5) were synthesized via ethyl 2-substituted 1, 3, 4-thiadiazol-5-ylacetates (11 and 17) as key intermediates.