描述了使用催化剂 B(C 6 F 5 ) 3、苄基二甲基硅烷和 H 2 O对靛红衍生物进行有效的化学选择性还原。值得注意的是,少量的水被证明是一种高效的反应促进剂,可以减少合成三氢吲哚的反应时间和温度。此外,使用方法,通过使用 B(C 6 F 5 ) 3和 D 2 O对吲哚啉-3-酮进行催化 α-氘化,实现了优异的氘结合。
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed Highly Chemoselective Reduction of Isatins: Synthesis of Indolin-3-ones and Indolines
作者:Hyojin Jeong、Nara Han、Dong Wook Hwang、Haye Min Ko
DOI:10.1021/acs.orglett.0c03150
日期:2020.10.16
A chemo- and site-selective reduction reaction of isatin derivatives using catalystB(C6F5)3 and hydrosilanes is described. This transformation is operationally simple, proceeds under mild conditions, and is resistant to various functional groups. Thus, this efficient reaction using a combination of B(C6F5)3 and BnMe2SiH or B(C6F5)3 and Et2SiH2 could potentially be utilized to produce various indolin-3-ones
描述了使用催化剂B(C 6 F 5)3和氢硅烷的靛红衍生物的化学和位置选择性还原反应。该转化操作简单,在温和条件下进行,并且抗各种官能团。因此,结合使用B(C 6 F 5)3和BnMe 2 SiH或B(C 6 F 5)3和Et 2 SiH 2的有效反应可以潜在地用于生产各种吲哚3-3-酮和二氢吲哚。无需多步程序和金属催化条件。
Flexible and practical synthesis of 3-oxyindoles through gold-catalyzed intermolecular oxidation of o-ethynylanilines
作者:Chao Shu、Long Li、Xin-Yu Xiao、Yong-Fei Yu、Yi-Fan Ping、Jin-Mei Zhou、Long-Wu Ye
DOI:10.1039/c4cc03565h
日期:——
A novel gold-catalyzedintermolecular oxidation of o-ethynylanilines has been developed. A range of functionalized 3-oxyindoles are readily accessed by utilizing this strategy. Importantly, this gold-catalyzed oxidative process outcompetes the typical indole formation.
본 발명은 인돌린 유도체 및 이의 제조 방법에 대한 것으로, 아이사틴과 하이드로실레인을 붕소 촉매 하에서 인돌린 유도체를 합성한다. 특히, 아이사틴의 반응성이 적은 2번 탄소의 카르보닐기를 환원하여 인돌린-3-온 유도체를 한 단계로 합성할 수 있다. 또한, 다양한 치환기를 가진 신규한 인돌린 유도체를 합성할 수 있어, 이를 다양한 분야에 응용할 수 있다.
An Assembly of Pyrano[3,2‐b]indol‐2‐ones via NHC‐Catalyzed [3 + 3] Annulation of Indolin‐3‐ones with Ynals†
作者:Xia Wang、Shulei Zhang、Shao‐Jie Wang、Hao An、Xiaolan Xin、Haonan Lin、Zhifeng Tu、Shenci Lu
DOI:10.1002/cjoc.202300728
日期:2024.7
We report herein an unprecedented N-heterocycliccarbene-catalyzed formal [3 + 3] annulation of ynals with N-Ts indolin-3-ones under the oxidation condition affording the functionalized pyrano[3,2-b]indol-2-ones. The alkynyl acylazoliums via the combination of a carbene with ynals in the presence of oxidate proved to be the important intermediates for the success of this transformation. This method