Application of Isayama–Mukaiyama cobalt catalyzed hydroperoxysilylation for the preparation of ritonavir hydroperoxide
作者:Sharon Gazal、Priya Gupta、Siva Ramakrishna Gunturu、Matthew Isherwood、Matthew E. Voss
DOI:10.1016/j.tetlet.2016.10.022
日期:2016.11
We report the preparation of thiazol-5-ylmethyl ((2S,3S,5S)-5-((S)-2-(3-((2-(2-hydroperoxypropan-2-yl)thiazol-4-yl)methyl)-3-methylureido)-3-methylbutanamido)-3-hydroxy-1,6-diphenylhexan-2-yl)carbamate, a hydroperoxide impurity of ritonavir also known as ritonavir USP impurity G. Due to the complexity of ritonavir’s structure and abundance of oxidation susceptible functional groups, forced degradation
我们报告了噻唑-5-基甲基((2 S,3 S,5 S)-5-((S)-2-(3-((2-(2-hydroperoxypropan-2-yl)thiazol-4 -基)甲基)-3-甲基脲基)-3-甲基丁酰胺基)-3-羟基-1,6-二苯基己-2-基)氨基甲酸酯,利托那韦的氢过氧化物杂质,也被称为利托那韦USP杂质G。发现利托那韦的结构和大量易受氧化作用的官能团,强迫降解是一种非选择性和不足的策略。因此,应用了多步合成。总体策略涉及将丙烯基部分最初引入到末端噻唑中,从而能够使用Co(thd)2(0.1 equiv)/ O 2进行选择性氧化 结构组装后(Isayama–Mukaiyama钴催化的氢过氧化硅烷化)。