Thiol-Free Synthesis of Oseltamivir and Its Analogues via Organocatalytic Michael Additions of Oxyacetaldehydes to 2-Acylaminonitroalkenes
作者:Július Durmis、Radovan Šebesta、Juraj Rehák、Martin Huťka、Attila Latika、Henrich Brath、Ambroz Almássy、Viktória Hajzer、Štefan Toma
DOI:10.1055/s-0031-1290396
日期:2012.8
diastereoisomer can be efficiently epimerized. The resulting cyclohexenes are precursors to oseltamivir and its analogues. The synthesis of the key reagent, 3-pentyloxyaldehyde, was also improved. The organocatalytic addition of substituted oxyacetaldehydes to 2-acylaminonitroethenes proceeded with good to high diastereoselectivities and enantioselectivities. The resulting adducts reacted with ethyl 2-(diethoxyphosphoryl)
摘要 取代的氧乙醛向2-酰基氨基硝基乙烯的有机催化加成反应具有良好至高的非对映选择性和对映选择性。所得的加合物与2-(二乙氧基磷酰基)丙烯酸乙酯反应,得到高度官能化的环己烯。已经开发了无硫醇环化方案,该方案可导致两种非对映异构体的混合物分离。不需要的非对映异构体可以被有效地差向异构。所得环己烯是奥司他韦及其类似物的前体。关键试剂3-戊氧基乙醛的合成也得到了改善。 取代的氧乙醛向2-酰基氨基硝基乙烯的有机催化加成反应具有良好至高的非对映选择性和对映选择性。所得的加合物与2-(二乙氧基磷酰基)丙烯酸乙酯反应,得到高度官能化的环己烯。已经开发了无硫醇环化方案,该方案可导致两种非对映异构体的混合物分离。不需要的非对映异构体可以被有效地差向异构。所得环己烯是奥司他韦及其类似物的前体。关键试剂3-戊氧基乙醛的合成也得到了改善。