Efficient Kilogram-Scale Synthesis of a Novel Oxazolidinone Antibacterial Candidate <b>YG-056SP</b>
作者:Yinyong Zhang、Yushe Yang、Xin Meng、Xianli Zhou、Bin Guo
DOI:10.1021/acs.oprd.2c00350
日期:2023.2.17
N-methyloxazolidone, employing an asymmetric reduction of the carbonyl and methylamine substitution, followed by the cyclization with N,N′-carbonyldiimidazole. Another highlight is the safe construction of the fused ring with high optical purity. Epoxy intermediates were obtained by intramolecular ring closure, and reacted with phenol fragments, followed by reduction, protection, and an intramolecular tandem
描述了用于治疗多重耐药革兰氏阳性细菌感染的新型恶唑烷酮抗菌候选物YG-056SP的改进千克级合成的开发。新工艺的特点是一步经济地构建手性N-甲基恶唑烷酮,采用羰基和甲胺取代的不对称还原,然后与N、N环化'-羰基二咪唑。另一个亮点是具有高光学纯度的稠环的安全结构。环氧中间体通过分子内闭环得到,与苯酚片段反应,再经还原、保护和分子内串联反应得到稠合环。残局过程的特点是一锅完成宫浦反应和铃木偶联反应,叔丁基二甲基甲硅烷基脱保护生成磷酸二苄酯。最后用廉价的盐酸脱苄基保护,得到YG-056SP具有明确的粒度分布,适用于晶体转化后的临床前研究。与初始合成路线相比,该优化工艺的总收率从2.3%显着提高至29.6%。