The syntheses of polycyclic thienoindolines bearing a dihydrothiophene or tetrahydrothiophene subunit have not been reported, despite the fact that such compounds may have interesting medicinal properties. Herein, we report a protocol for accessing polycyclic dihydrothiophenes by means of formal [2+2+1] intramolecular dearomatizing cyclization of alkynyl indoles with K2S and S8 as the sources of sulfide
带有二氢噻吩或四氢噻吩亚基的多环噻吩并二氢吲哚的合成尚未见报道,尽管这些化合物可能具有有趣的药用特性。在此,我们报告了一种通过正式 [2+2+1] 分子内脱芳构化环化炔基吲哚与 K 2 S 和 S 8作为硫化物来源获得多环二氢噻吩的方案。此外,四氢噻吩并二氢吲哚是通过一锅两步法立体选择性合成的,包括 AgNO 3催化的烯基脱芳构化,然后是两个涉及 K 2 S 的亲核加成反应。
Synthesis of <i>gem</i>
-Difluorinated Spiro-γ-lactam Oxindoles by Visible-Light-Induced Consecutive Difluoromethylative Dearomatization, Hydroxylation, and Oxidation
作者:Qiang Wang、Yi Qu、Qing Xia、Hongjian Song、Haibin Song、Yuxiu Liu、Qingmin Wang
DOI:10.1002/chem.201802141
日期:2018.8.6
Described herein is a protocol for visible‐light‐induced consecutivesynthesis of gem‐difluorinated spiro‐γ‐lactam oxindoles under mild conditions by means of a process involving sequential radical difluoromethylativedearomatization, hydroxylation, and oxidation. The protocol features high chemo‐ and regioselectivity, good functional group tolerance, and easy scalability. Several of the functionalized
[EN] ACYL-SUBSTITUTED OXAZINO-QUINAZOLINE COMPOUND, PREPARATION METHOD THEREFOR, AND USES THEREOF<br/>[FR] COMPOSÉ D'OXAZINO-QUINAZOLINE À SUBSTITUTION ACYLE, SON PROCÉDÉ DE PRÉPARATION ET SES APPLICATIONS<br/>[ZH] 一种酰基取代的噁嗪并喹唑啉类化合物、制备方法及其应用
Polycyclic indolines and indolenines were synthesized via base-catalyzed intramolecular dearomatizing 3-alkenylation reactions of alkynyl indoles 1 at room temperature. The base enhanced the nucleophilicity of the carbon at the 3-position of the indole moiety, facilitating an exclusive 5-exo-dig cyclization reaction with the alkyne to form spiroindolenines 2. The imine functionality of 2 could undergo
多环的二氢吲哚和假吲哚合成通过在室温下炔基吲哚1的碱催化的分子内dearomatizing 3-烯基化反应。碱增强了吲哚部分 3 位碳的亲核性,促进与炔烃的独家 5- exo- dig 环化反应形成螺吲哚 2。 2 的亚胺官能团可以进行原位亲核加成形成螺吲哚3 当 R 是氨基甲酰基或还原形成螺二氢吲哚时 4 当 R 是 H 时。