Synthesis of Penicillenol C<sub>1</sub> and of a Bis-Azide Analogue for Photoaffinity Labeling
作者:Karl Kempf、Aruna Raja、Florenz Sasse、Rainer Schobert
DOI:10.1021/jo3026737
日期:2013.3.15
enantiopure 2-methyloct-(6E)-enoic acids. The 5S,6R,9S isomer has NMR spectra and optical rotation identical with those of the natural compound. A bis-azide-tagged penicillenol analogue was also synthesized for photoaffinity labeling of target proteins. The photolysis of the bis-azide in the presence of methanol as a protein-mimicking nucleophile led to reaction only of the aryl azide, while leaving the
青霉代谢产物青霉素C 1的两种非对映异构体是通过将1-苏氨酸衍生的四酸与对映体纯的2-甲基辛基-(6 E)-烯酸进行3-酰化而首次合成的。5 S,6 R,9 S异构体的NMR光谱和旋光度与天然化合物相同。还合成了双叠氮化物标记的青霉素烯类似物,用于靶蛋白的光亲和标记。在甲醇(类似于蛋白质的亲核试剂)的存在下,双叠氮化物的光解仅导致芳基叠氮化物的反应,而苄基叠氮化物可用于下拉或附着荧光示踪剂。作为概念的证明,通过叠氮化物标签和膦荧光团之间的施陶丁格(Staudinger)连接,可以看到在活细胞中这种双叠氮化物标记的四酸的分布。