Bismuth(III) Triflate Catalyzed Three-Component Reactions of Indoles, Ketones, and α-Bromoacetaldehyde Acetals Enable Indole-to-Carbazole Transformation
作者:Yanlong Gu、Wenbo Huang、Shaomin Chen、Xin Wang
DOI:10.1021/acs.orglett.8b01707
日期:2018.7.20
A three-component reaction of indoles, α-bromoacetaldehyde acetals, and ketones was developed by using bismuth(III) triflate as the catalyst to realize a straightforward approach for synthesizing carbazole derivatives. The reaction was established mechanistically through the autotandem catalysis of Bi(OTf)3 in the following two steps: (i) Friedel–Crafts-typealkylation of indole with α-bromoacetaldehyde
1,2-Silylpyridylation Reaction of Aryl Alkenes with Silylboronate
作者:Liuzhou Gao、Xueting Liu、Guoao Li、Shengda Chen、Jia Cao、Guoqiang Wang、Shuhua Li
DOI:10.1021/acs.orglett.2c02074
日期:2022.8.12
A metal-free silyl-pyridylation of alkenes using silyl boronates and B2pin2 through a pyridine-mediated B-interelement activation has been demonstrated, which provides a practical strategy for a variety of C4-silylalkylated pyridines. DFT calculations and control experiments show that the reaction proceeds through a silyl radical addition/radical–radicalcoupling sequence. This protocol features a
已经证明了使用甲硅烷基硼酸盐和 B 2 pin 2通过吡啶介导的 B 元素间活化对烯烃进行无金属甲硅烷基吡啶基化,这为各种 C 4甲硅烷基烷基化吡啶提供了实用的策略。DFT 计算和控制实验表明,反应通过甲硅烷基自由基加成/自由基-自由基偶联顺序进行。该协议具有广泛的底物范围和优异的官能团兼容性,因此在生物活性分子的后期修饰中展示了巨大的潜力。
Cationic photoinitiator and preparation method and use thereof
申请人:Changzhou Tronly New Electronic Materials Co., Ltd.
公开号:US10995082B2
公开(公告)日:2021-05-04
This invention discloses a novel cationic photoinitiator and a preparation method and use thereof. The cationic photoinitiator has a structure as represented by general formula (I) below. It can match a longer absorption wavelength in the process of application and has an outstanding photosensitive property, and has characteristics of no proneness to migration and good yellowing resistance.