Macrolide biosynthesis. 7. Incorporation of polyketide chain elongation intermediates into methymycin
作者:David E. Cane、Ralph H. Lambalot、P. C. Prabhakaran、Walter R. Ott
DOI:10.1021/ja00055a023
日期:1993.1
Administration of [1-[sup 13]C]propionate to cultures of Streptomyces venezuelae SC 2366 gave methymycin (1), which was shown by [sup 13]C NMR analysis to be labeled at the predicted sites, C-1, C-3, C-5, C-9, and C-11. Similarly, incorporation of [1,2-[sup 13]C]acetate gave methymycin labeled at C-7 and C-8. A series of presumptive intermediates of polyketide chain elongation was also successfully
将 [1-[sup 13]C] 丙酸盐施用于 Streptomyces venezuelae SC 2366 的培养物会产生甲基霉素 (1),[sup 13]C NMR 分析表明其在预测位点 C-1、C- 3、C-5、C-9 和 C-11。类似地,[1,2-[sup 13] C] 乙酸酯的掺入得到在 C-7 和 C-8 处标记的甲霉素。一系列推测的聚酮链延长中间体也被成功纳入。因此,加入 (2S,3R)-[2,3-[sup 13]C[sub 2]]-2-methyl-3-hydroxypentanoyl N-乙酰半胱胺 (NAC) 硫酯 7a 得到了甲霉素 (1) 和新甲霉素 ( 2) 按预期在 C-10 和 C-11 处标记。在补充实验中,(2S,3R)-[3-[sup 2]H,3-[sup 13]C]-2-methyl-3-hydroxypentanoyl NAC thioester 7b