Prins Cyclization Using Magnesium Halides: Mild Access to 4-Halogenated Polysubstituted Tetrahydropyrans with a Special Feature
作者:Dieter Schinzer、Mario Walter
DOI:10.1055/s-0033-1340739
日期:——
Different 4-halo-substituted polyfunctionalized tetrahydropyrans were easily synthesized by segment-coupling Prins cyclization utilizing magnesium halides. The moderate Lewis acidity allows transformation of substrates bearing acid-labile functional groups. A solvent dependency of the stereochemistry at the C4 carbon was observed.
不同的 4-卤代多官能化四氢吡喃很容易通过使用卤化镁的链段偶联 Prins 环化来合成。适度的路易斯酸度允许带有酸不稳定官能团的底物转化。观察到 C4 碳上立体化学的溶剂依赖性。