通过Rh(III)催化的异喹诺酮与重氮酮酸酯的氧化[4 +1]环加成,然后进行原位脱酰反应,制备异吲哚并[2,1 - b ]异喹啉-7-羧酸酯衍生物的新颖实用的方法是披露。有趣的是,标题化合物可以很容易地通过去酯化反应转变为异吲哚并[2,1 - b ]异喹啉-5(7 H)-,这是一种罗塞他汀类似物,经常在各种天然生物碱和合成药物分子中发现。
已开发出在1个大气压的二氧化碳下,钯催化的惰性C-H键活化和异喹诺酮的环羰基化反应,导致异吲哚并[2,1 – b ]异喹啉-5,7-二酮。这种转变具有很高的区域选择性和化学选择性,逐步经济性和良好的官能团耐受性。大部分相应的产品以中等到良好的产率获得。它为合成有用的多种异吲哚并[2,1 - b ]异喹啉-5,7-二酮衍生物提供了另一种方法。
Redox-Neutral [4 + 2] Annulation of <i>N</i>-Methoxybenzamides with Alkynes Enabled by an Osmium(II)/HOAc Catalytic System
作者:Jian Yang、Liexin Wu、Huiying Xu、Hui Gao、Zhi Zhou、Wei Yi
DOI:10.1021/acs.orglett.9b03827
日期:2019.12.20
C-H activation strategy, an efficient osmium(II)-catalyzed redox-neutral [4 + 2] annulation of N-methoxybenzamides with alkynes has been accomplished. Computational and experimental studies revealed that such transformation leading to the synthesis of the isoquinolone core might follow an Os(II)-Os(IV)-Os(II) catalytic pathway, in which an unusual HOAc-assisted oxidative addition of osmium(II) into
Ruthenium-Catalyzed Isoquinolone Synthesis through CH Activation Using an Oxidizing Directing Group
作者:Bin Li、Huiliang Feng、Shansheng Xu、Baiquan Wang
DOI:10.1002/chem.201102445
日期:2011.11.4
The oxidant directs: A mild, practical, efficient, and regioselective Ru‐catalyzed isoquinolone synthesis with a broad substrate scope was reported (see scheme). In this redox neutral process, the aromatic CH bond functionalization can be performed at room temperature without using any external oxidant. The mechanism of the reaction was probed, and it was found that CH activation is the turnover‐limiting
Palladium-Catalyzed Oxidative Cyclocarbonylation of Isoquinolones with CO via C−H/N−H Bond Cleavage: Easy Access to Isoindolo[2,1-<i>b</i>
]isoquinoline-5,7-dione Derivatives
作者:Shenghai Guo、Fang Wang、Lincong Sun、Xinying Zhang、Xuesen Fan
DOI:10.1002/adsc.201800347
日期:2018.7.4
An efficient and practical synthesis of isoindolo[2,1‐b]isoquinoline‐5,7‐diones through Pd‐catalyzed C−H activation/carbonylative annulation of isoquinolones with CO (1 atm) is presented. Deuterium‐labeling experiments revealed that the aryl C(sp2)−H bondactivation might be the rate‐determining step. More interestingly, the title compounds could also be prepared directly from the cascade reaction
提出了一种通过Pd催化的CH活化/异喹啉酮与CO(1 atm)羰基环化反应有效合成异吲哚并[2,1 – b ]异喹啉-5,7-二酮的方法。氘标记实验表明,芳基C(sp 2)-H键的活化可能是决定速率的步骤。更有趣的是,标题化合物也可以直接由N-甲氧基苯甲酰胺和内部炔烃(作为异喹诺酮的前体)在一氧化碳的大气压下,通过Rh / Pd中继催化,以用户友好的方式级联反应制备。。
Rhodium-catalyzed C–H activation of hydrazines leads to isoquinolones with tunable aggregation-induced emission properties
Diversity-Oriented Synthesis through Rh-Catalyzed Selective Transformations of a Novel Multirole Directing Group
作者:Bo Su、Jiang-bo Wei、Wen-lian Wu、Zhang-jie Shi
DOI:10.1002/cctc.201500410
日期:2015.9.14
functionalization, directing‐group strategy was developed for the improvement of chemical reactivity and selectivity. Recently, to avoid the inherent limitations of traditional mono‐role directinggroups, a dual‐role oxidizing‐directing‐group strategy was developed, in which the directinggroup acts both as directinggroup and oxidant. Herein, we report a multiroledirectinggroup, which possesses multiple