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。
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(<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。
A practical one-pot procedure for the synthesis of N–H isoquinolones
A practical one-pot procedure for the preparation of N-H isoquinolones has been developed. This 2-step process via C-H activation of N-alkoxyl benzamides and NaH-mediated dealkoxylation reaction has been demonstrated to be a high yielding alternative methodology for the efficient synthesis of a wide range of representative N-H isoquiolones. In addition, the experimental precedent supported mechanism of the dealkoxylation reaction was also proposed. (C) 2013 Elsevier Ltd. All rights reserved.