Oxidative Coupling of NH Isoquinolones with Olefins Catalyzed by Rh(III)
摘要:
Rh(III)-catalyzed oxidative coupling reactions between isoquinolones with 3-aryl groups and activated olefins have been achieved using anhydrous Cu(OAc)(2) as an oxidant to give tetracyclic products. The nitrogen atom acts as a directing group to facilitate ortho C-H activation. This reaction can be one-pot starting from methyl benzohydroxamates, without the necessity of the isolation of isoquinolone products. Abroad scope of substrates has been demonstrated, and both terminal and internal activated olefins can be applied. In the coupling of N-methylmaleimide, a Wacker-like mechanism was proposed, where backside attack of the NH group in isoquinolones is suggested as a key step. Selective C-H activation has also been achieved at the 8-position of 1-naphthol, leading to an olefination product.
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。。
Development of a Traceless Directing Group: Cp*-Free Cobalt-Catalyzed C–H Activation/Annulations to Access Isoquinolinones
作者:Minghui Liu、Jun-Long Niu、Dandan Yang、Mao-Ping Song
DOI:10.1021/acs.joc.9b03073
日期:2020.3.20
A new tracelessdirectinggroup, 2-(hydroxymethyl)pyridine, has been reported for the Cp*-free cobalt-catalyzedC-H activation/annulation reaction to synthesize isoquinolinones. The reaction exhibits good functional group tolerance, affording products in good to excellent isolated yields under mild conditions. Notably, the directinggroup can be removed directly in situ along the catalytic process
Rh(
<scp>III</scp>
)‐Catalyzed Diverse C—H Functionalization of Iminopyridinium Ylides
作者:Zhenzhen Dong、Pengfei Li、Xingwei Li、Bingxian Liu
DOI:10.1002/cjoc.202100203
日期:2021.9
Divergent synthesis of useful skeletons has been realized via rhodium(III)-catalyzed C—H activation of iminopyridinium ylides and coupling with various unsaturated coupling reagents. Isocoumarins and isoquinolones were obtained via cleavage of the C—N or N—N bond in the ylidic directing group, while fluorinated alkenes were delivered with the directing group intact. The reactions occurred with wide
Rhodium(<scp>iii</scp>)-catalyzed oxidative annulation of isoquinolones with allyl alcohols: synthesis of isoindolo[2,1-<i>b</i>]isoquinolin-5(7<i>H</i>)-ones
作者:Jinyuan Jiang、Jidan Liu、Zhenke Yang、Jieying Zheng、Xin Tian、Liyao Zheng、Zhao-Qing Liu
DOI:10.1039/d1ob02305e
日期:——
An efficient rhodium(III)-catalyzed direct C–H oxidative annulation of isoquinolones with allyl alcohols as C1 synthons has been successfully developed. This protocol enables the straightforward synthesis of structurally diverse isoindolo[2,1-b]isoquinolin-5(7H)-ones with high atom economy, tolerates a broad spectrum of functionalities, and is applicable to one-pot operation from readily available
已经成功开发了一种高效的铑(III)催化的异喹诺酮类与烯丙醇作为 C1 合成子的直接 C-H 氧化环化。该协议能够直接合成结构多样的 isoindolo [2,1- b ]isoquinolin-5(7 H )-ones,具有高原子经济性,耐受广泛的功能,适用于从现成的N的一锅操作-甲氧基苯甲酰胺。
Rh(III)-Catalyzed Oxidative Annulation of Isoquinolones with Diazoketoesters Featuring an <i>in Situ</i> Deacylation: Synthesis of Isoindoloisoquinolones and Their Transformation to Rosettacin Analogues
作者:Shenghai Guo、Lincong Sun、Fang Wang、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.8b01982
日期:2018.10.5
A novel and practical procedure for the preparation of isoindolo[2,1-b]isoquinoline-7-carboxylate derivatives through a Rh(III)-catalyzed oxidative [4 + 1] cycloaddition of isoquinolones with diazoketoesters followed by an in situ deacylation reaction is disclosed. Intriguingly, the title compounds could be easily converted into isoindolo[2,1-b]isoquinolin-5(7H)-ones via de-esterification, which are
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。