New, Azide-Free Transformation of Epoxides into 1,2-Diamino Compounds: Synthesis of the Anti-Influenza Neuraminidase Inhibitor Oseltamivir Phosphate (Tamiflu)
作者:Martin Karpf、René Trussardi
DOI:10.1021/jo005702l
日期:2001.3.1
amino function was accomplished by opening of the oxirane ring with allylamine followed by Pd/C-catalyzed deallylation to the amino alcohol 16. The introduction of the second amino group was then accomplished via an efficient reaction cascade involving a domino sequence preferably utilizing a transient imino protection. Selective acetylation of the resulting diamine 17 was achieved under acidic conditions
描述了一种新的,无叠氮化物的关键前体环氧化合物6向流感神经氨酸酶抑制剂前药磷酸奥司他韦(1,Tamiflu)的无叠氮化物转化。该顺序代表环氧化物向没有潜在毒性和危险的叠氮化物试剂和中间体的1,2-二氨基化合物的新型高效转化,并且避免了还原和氢化条件。使用催化MgBr(2).OEt(2)作为一种新的,廉价的路易斯酸,第一个氨基官能团的引入是通过用烯丙胺打开环氧乙烷环,然后Pd / C催化脱氨成氨基醇16。然后通过涉及多米诺序列的有效反应级联反应优选地利用瞬时亚氨基保护来完成第二个氨基的引入。