作者:Manfred Braun、Gwenaëlle Kergoët、Fabian Kruska、Walter Frank
DOI:10.1055/s-0029-1218744
日期:2010.6
A new route to the DEF-ring building block of fredericamycin A has been elaborated. The five-step synthesis involves a photo-Wolff reaction as the key step and leads to carboxylic acid 2 in 27% overall yield, starting from the pyridine derivative 3. Two intermediates, the tricyclic ketones 6a and 7, are characterized by crystal structure analyses. heterocycles - rearrangement - diazo compounds - annulation
已拟定了一条新路线,以建立腓特烈霉素A的DEF环结构单元。五步合成法涉及光-沃尔夫反应作为关键步骤,从吡啶衍生物3开始,以27%的总产率生成羧酸2。通过晶体结构分析来表征两个中间体三环酮6a和7。 杂环-重排-重氮化合物-环空-羧酸