A novel and efficient iron-catalyzed sp3 carbon-hydrogenbond functionalization of benzoxazinone derivatives has been developed. For the first time, benzoxazin-2-ones were hired as substrates in an oxidative dehydrogenative coupling reaction....
Oxidative Cross-Dehydrogenative-Coupling Reaction of 3,4-Dihydro-1,4-Benzoxazin-2-ones through Visible-Light Photoredox Catalysis
作者:Guo-Yan Zhang、Kai-Xin Yu、Chen Zhang、Zhi Guan、Yan-Hong He
DOI:10.1002/ejoc.201701683
日期:2018.1.31
The cross‐dehydrogenative‐coupling (CDC) reaction of benzoxazin‐2‐ones through visible‐light photoredox catalysis in air at room temperature is described.
描述了室温下空气中可见光光氧化还原催化的苯并恶嗪-2-酮的交叉脱氢偶联(CDC)反应。
Synergistic promoting effect of ball milling and Fe(ii) catalysis for cross-dehydrogenative-coupling of 1,4-benzoxazinones with indoles
In this work, a novel C(sp 3 )–C(sp2 ) cross-dehydrogenative-coupling method is developed to react benzoxazin-2-one derivatives with various indoles. As a result, combined use of ball milling and Fe( ii ) catalysis leads to rapid coupling of 1,4-benzoxazinones with derivatives of indole. Under the conditions, derivatives of 1 couple with various indoles at room temperature to produce good yields of
A novel C(sp3)–C(sp2) cross-dehydrogenative-coupling procedure was developed for the reaction of benzoxazin-2-ones with indole derivatives. Thus, ionic liquid-mediated coupling of 1,4-benzoxazinone derivatives with indoles were observed in which [Omim]Cl/FeCl3 acted as both the solvent and the catalyst. Under [Omim]Cl/FeCl3-TBHP conditions, derivatives of 1 coupled at roomtemperature with indoles
The sp3-C–H peroxidation of 3,4-dihydro-1,4-benzoxazin-2-ones was achieved. C(sp3)–OO bond could be further converted into C(sp3)–C(sp3), C(sp3)–C(sp2), C(sp3)–C(sp), C–P and CO bond by late stage functional group transformations.