作者:Alexandridis, Anestis、Rancon, Thibault、Halliday, Abigail、Kochem, Amélie、Quintard, Adrien
DOI:10.1021/acs.orglett.4c01969
日期:——
newly formed stereocenters. When iron-catalyzed borrowing hydrogen from allylic alcohols was combined with a stereocontrolled organocatalytic oxa-Michael addition, a wide array of chiral tetrahydropyrans were efficiently prepared. The reaction could be performed in a diastereoselective manner from pre-existing stereocenters or enantioselectively from achiral substrates. The key to success was the reactivity
立体控制的 oxa-Michael 加成具有挑战性,因为该过程具有高度可逆性,最终导致新形成的立体中心外消旋化。当铁催化的烯丙醇借氢与立体控制的有机催化氧杂迈克尔加成相结合时,可以有效地制备多种手性四氢吡喃。该反应可以以非对映选择性方式从预先存在的立体中心进行或以对映选择性方式从非手性底物进行。成功的关键是铁络合物的反应活性,它对烯丙醇脱氢具有选择性,并不可逆地导致反应生成最终产物。