α<i>,</i>β-Unsaturated Carbonyls for One-Pot Transition-Metal-Free Access to 3,6-Dihydro-2<i>H</i>-pyrans
作者:Pankaj Kumar、Navpreet Kaur、Rakesh Kumar、Prabal Banerjee
DOI:10.1021/acs.joc.2c00379
日期:2022.6.3
has been developed for accessing mono-, di-, and trisubstituted 3,6-dihydro-2H-pyran derivatives by simply subjecting α,β-unsaturated carbonyls to the carefully optimized Corey–Chaykovsky reaction conditions. The strategy provides selectively substituted dihydropyran derivatives in good to excellent yields with a broad substrate scope under very mild reaction conditions. Easy transformation of the final
通过简单地使 α,β-不饱和羰基化合物经受精心优化的 Corey-Chaykovsky 反应条件,开发了一种有效的方案来获得单取代、二取代和三取代的 3,6-二氢-2 H-吡喃衍生物。该策略在非常温和的反应条件下以良好至优异的产率提供选择性取代的二氢吡喃衍生物,并具有广泛的底物范围。将最终的 3,6-二氢-2 H-吡喃轻松转化为有价值的 5,6-二氢-2 H-吡喃-2-酮和四氢-2 H-吡喃衍生物,将这种方法的范围扩大到多种恶环化合物。此外,所开发的策略还发现了外消旋戈尼硫胺素的两步法应用,该酶因其细胞毒性行为而被广泛研究。