Total Synthesis of TAN-1057 A/B, a New Dipeptide Antibiotic fromFlexibacter sp. PK-74
作者:Viktor V. Sokolov、Sergei I. Kozhushkov、Sofia Nikolskaya、Vladimir N. Belov、Mazen Es-Sayed、Armin de Meijere
DOI:10.1002/(sici)1099-0690(199805)1998:5<777::aid-ejoc777>3.0.co;2-w
日期:1998.5
23 (30%). The latter was deprotected by hydrogenolysis to give the final compound as a mixture of two epimers − TAN-1057A, B − isolated previously from a strain of Flexibacter sp. PK-74. The intermediate 3 was prepared from 3-amino-2-(N-Z-N-methylamino)propionic acid methyl ester hydrochloride (16) and 2-methyl-2-thiopseudobiuret hydroiodide (18) in one step in 35% yield.
TAN-1057 (1a, b) - 一种对耐甲氧西林金黄色葡萄球菌具有活性的新型天然二肽抗生素 - 从 Nα、Nδ、Nω-tri-ZL-精氨酸 20b 开始,通过相应的重氮酮 21b 合成。这在光解后重排为烯酮,其被 (±)-2,4,5,6-四氢-5-甲氨基-2-脲基嘧啶-4-一 (3) 捕获,得到完全保护的二肽 23 (30%) . 后者通过氢解脱保护得到最终化合物,为两种差向异构体的混合物 - TAN-1057A,B - 先前从 Flexibacter sp. 菌株中分离。PK-74。中间体3由3-氨基-2-(NZN-甲基氨基)丙酸甲酯盐酸盐(16)和2-甲基-2-硫代伪缩二脲氢碘化物(18)一步制备,产率为35%。