energy-transfer enabled highly regioselective intermolecular aminocarboxylation reaction for the single-step installation of both amine and ester functionalities into alkenes or (hetero)arenes. A bifunctional oxime oxalate ester was developed to simultaneously generate C-centred ester and N-centred iminyl radicals. This mild method features a remarkably broad substrate scope (up to 140 examples) and excellent tolerance
β-氨基酸经常被发现是许多生物活性分子、药物和天然产物中的重要成分。特别是,由于它们提高了代谢稳定性,它们被广泛用于构建生物活性肽和肽模拟物。尽管建立了许多用于制备 β-氨基酸衍生物的方法,但这些方法中的大多数都需要金属介导的预功能化底物的多步操作。在这里,我们公开了一种无金属、能量转移的高区域选择性分子间氨基羧化反应,用于将胺和酯官能团单步安装到烯烃或(杂)芳烃中。开发了一种双功能肟草酸酯以同时产生以 C 为中心的酯和以 N 为中心的亚氨基自由基。
A base-controlled switch of SO2 reincorporation in photocatalyzed radical difunctionalization of alkenes
作者:Huamin Wang、Peter Bellotti、Xiaolong Zhang、Tiffany O. Paulisch、Frank Glorius
DOI:10.1016/j.chempr.2021.10.007
日期:2021.12
Palladium-Induced Intramolecular Pyridine-Allyl Coupling Reactions: Formation of N-Bridgehead Heterocycles with a Stable C–N Bond
The direct, stereospecific amination of alkylboronic and borinic esters can be conducted by treatment of the organoboron compound with methoxyamine and potassium tert-butoxide. In addition to being stereospecific, this process also enables the direct amination of tertiary boronic esters in an efficient fashion.