Iron(II)-Catalyzed Intramolecular Aminohydroxylation of Olefins with Functionalized Hydroxylamines
摘要:
A diastereoselective aminohydroxylation of olefins with a functionalized hydroxylamine is catalyzed by new iron(II) complexes. This efficient intramolecular process readily affords synthetically useful amino alcohols with excellent selectivity (dr up to > 20:1). Asymmetric catalysis with chiral iron(II) complexes and preliminary mechanistic studies reveal an iron nitrenoid is a possible intermediate that can undergo either aminohydroxylation or aziridination, and the selectivity can be controlled by careful selection of counteranion/ligand combinations.
基于钴(II)的金属催化已成功地用于烯丙基叠氮基甲酸酯的自由基双环化,以构建氮丙啶/恶唑烷酮融合的双环结构。D 2对称的手性氨基卟啉3,5-Di t Bu-QingPhyrin的Co(II)配合物已被鉴定为这种羰基叠氮化物分子内自由基叠氮化的有效金属铁催化剂,可合成高产具有高非对映体和对映体选择性的有用的手性[3.1.0]-双环氮丙啶。
We report an iron-catalyzed asymmetric aminochlorination method for internal olefins; it tolerates valuable olefins that are incompatible with existing methods.
我们报道了一种铁催化的不对称氨基氯化方法,适用于内部烯烃;它容忍了与现有方法不兼容的有价值的烯烃。
Asymmetric Radical Bicyclization of Allyl Azidoformates via Cobalt(II)-Based Metalloradical Catalysis
作者:Huiling Jiang、Kai Lang、Hongjian Lu、Lukasz Wojtas、X. Peter Zhang
DOI:10.1021/jacs.7b05778
日期:2017.7.12
azidoformates to construct aziridine/oxazolidinone-fused bicyclic structures. The Co(II) complex of D2-symmetric chiral amidoporphyrin 3,5-DitBu-QingPhyrin has been identified as an effective metalloradical catalyst for the intramolecular radical aziridination of this type of carbonyl azides, allowing for high-yielding formation of synthetically useful chiral [3.1.0]-bicyclic aziridines with high diastereo-
基于钴(II)的金属催化已成功地用于烯丙基叠氮基甲酸酯的自由基双环化,以构建氮丙啶/恶唑烷酮融合的双环结构。D 2对称的手性氨基卟啉3,5-Di t Bu-QingPhyrin的Co(II)配合物已被鉴定为这种羰基叠氮化物分子内自由基叠氮化的有效金属铁催化剂,可合成高产具有高非对映体和对映体选择性的有用的手性[3.1.0]-双环氮丙啶。
Iron(II)-Catalyzed Intramolecular Aminohydroxylation of Olefins with Functionalized Hydroxylamines
A diastereoselective aminohydroxylation of olefins with a functionalized hydroxylamine is catalyzed by new iron(II) complexes. This efficient intramolecular process readily affords synthetically useful amino alcohols with excellent selectivity (dr up to > 20:1). Asymmetric catalysis with chiral iron(II) complexes and preliminary mechanistic studies reveal an iron nitrenoid is a possible intermediate that can undergo either aminohydroxylation or aziridination, and the selectivity can be controlled by careful selection of counteranion/ligand combinations.