Synthesis of Structurally Diversified Benzo[<i>c</i>]chromene Derivatives under (An)aerobic Conditions Catalyzed by CuI
作者:Fang Dong、Jian‐Quan Liu、Xiang‐Shan Wang
DOI:10.1002/jhet.3666
日期:2019.10
an α‐arylation with cyclohexane‐1,3‐diones to give 1H‐benzo[c]chromene‐1,6(2H)‐diones under Ar atmosphere catalyzed by CuI/l‐proline in the presence of Cs2CO3. The subsequent regioselective oxidation took place under O2 balloon automatically based on the substituents for the construction of structurally diversified benzo[c]coumarin derivatives.
2-溴代苯甲酸与环己烷-1,3-二酮进行α-芳基化反应,在存在CuI / l-脯氨酸的Ar气氛下,在Ar气氛下生成1 H-苯并[ c ] chromene -1,6(2 H)-二酮的Cs 2 CO 3。随后的区域选择性氧化是基于取代基在O 2气囊下自动进行的,用于构建结构多样化的苯并[ c ]香豆素衍生物。
Synthesis of Angular Polycyclic Aromatic Molecules via Rh(III)‐Catalyzed C−H Annulation of Nitrones with Cyclic 2‐Diazo‐1,3‐diones
作者:Yan Wang、Li‐Ming Zhao
DOI:10.1002/adsc.202300720
日期:2023.11.7
We herein disclose a simple and general method for the synthesis of chromendiones through Rh(III)-catalyzed C−H functionalization/annulation reactions of nitrones with cyclic 2-diazo-1,3-diones by using nitrone group as a traceless directing group. This method exhibits high efficiency and broad functional group compatibility. The derivatization of these chromendiones has been also demonstrated to further