Iodobenzene-Catalyzed Synthesis of Phenanthridinones via Oxidative C–H Amidation
作者:Dongdong Liang、Wenbo Yu、Nam Nguyen、Jeffrey R. Deschamps、Gregory H. Imler、Yue Li、Alexander D. MacKerell、Chao Jiang、Fengtian Xue
DOI:10.1021/acs.joc.7b00106
日期:2017.4.7
synthesis of phenanthridinones from N-methoxybenzamides using an oxidative C–H amidation reaction at room temperature in open air with modest to excellent yields. This method demonstrated unprecedented substrate scope. In particular, it solved the long-standing challenge in the synthesis of phenanthridinones with stericallydemanding substitutions.
In this report, the authors have clarified that the mu-oxo bridged heterocyclic hypervalent iodine compound 1 shows a more effective reactivity in the oxidative dearomatizing spirolactamization compared to conventional PIDA (phenyliodine(III) diacetate). Besides the high reactivity, a new selectivity during the oxidations based on the steric discrimination of the nitrogen groups of the pre-spirocyclic substrates is demonstrated for the heterocyclic hypervalent iodine compound 1.
Designer μ-oxo-bridged hypervalent iodine(iii) organocatalysts for greener oxidations
作者:Toshifumi Dohi、Naoko Takenaga、Kei-ichiro Fukushima、Teruyoshi Uchiyama、Daishi Kato、Shiro Motoo、Hiromichi Fujioka、Yasuyuki Kita
DOI:10.1039/c0cc03213a
日期:——
The in situ generated mu-oxo-bridged reactive hypervalentiodine(iii) species 1 or their analogues are introduced as more efficient organocatalysts for the catalytic strategy for realizing practical and greener oxidations.