Synthesis and structure–activity relationships of novel lincomycin derivatives. Part 4: synthesis of novel lincomycin analogs modified at the 6- and 7-positions and their potent antibacterial activities
作者:Yoshinari Wakiyama、Ko Kumura、Eijiro Umemura、Kazutaka Ueda、Takashi Watanabe、Keiko Yamada、Takafumi Okutomi、Keiichi Ajito
DOI:10.1038/ja.2017.54
日期:2017.8
To modify lincomycin (LCM) at the C-6 and the C-7 positions, we firstly prepared various substituted proline intermediates (7, 11-15 and 17). These proline intermediates were coupled with methyl 1-thio-α-lincosamide and tetrakis-O-trimethylsilylation followed by selective deprotection of the TMS group at the 7-position gave a wide variety of key intermediates (23-27, 47 and 50). Then, we synthesized
为了在C-6和C-7位置修饰林可霉素(LCM),我们首先制备了各种取代的脯氨酸中间体(7、11-15和17)。这些脯氨酸中间体与1-硫代-α-lincosamide甲基和四-O-三甲基甲硅烷基化偶合,然后在7位选择性脱保护TMS基团,得到各种各样的关键中间体(23-27、47和50)。然后,我们合成了应用Mitsunobu反应(S N)在7位修饰的各种新型LCM类似物2反应和Pd催化的交叉偶联反应。与相应的1'-N-甲基衍生物(3和37)相比,化合物34和35(1'-NH衍生物)对具有erm基因的抗性病原体表现出增强的抗菌活性。根据已报道的SAR,我们修饰了在C-7位置具有5-(2-硝基苯基)-1,3,4-噻二唑-2-基的LCM衍生物的4'-位。化合物56对带有erm基因的肺炎链球菌和化脓性链球菌显示出显着的强效抗菌活性,并且与34和57相比,具有针对erm基因的肺炎链球菌的活性得到了改善