Synthesis, odor characteristics and biological evaluation of <i>N</i>-substituted pyrrolyl chalcones
作者:Jingyi Hu、Xiaoming Ji、Fangyao Su、Qianrui Zhao、Ganlin Zhang、Mingqin Zhao、Miao Lai
DOI:10.1039/d2ob01561g
日期:——
Gas chromatography-mass spectrometry-olfactometry (GC-MS-O) was used to examine the odor properties of pyrrolyl chalcones, which are usually different from those of the associated acetylpyrroles and alcohols. The biological evaluation assay showed that the products (E)-3-(3-fluorophenyl)-1-(1-methyl-1H-pyrrol-2-yl)prop-2-en-1-one (3j), (E)-1-(1-ethyl-1H-pyrrol-2-yl)-3-phenylprop-2-en-1-one (4a), (E)
报道了一种在空气中借助t -BuOK 将N-取代的乙酰吡咯和伯醇转化为N-取代的吡咯基查耳酮的新方法,并获得了几种具有显着风味和生物活性的分子。该过程需要将醇氧化成相应的醛,而t -BuOK 对于通过醛醇缩合有效产生 C C 键至关重要。气相色谱-质谱-嗅觉测定法 (GC-MS-O) 用于检测吡咯查尔酮的气味特性,这些特性通常不同于相关的乙酰吡咯和醇类。生物学评价实验表明,产物( E )-3-(3-氟苯基)-1-(1-甲基-1)H -pyrrol-2-yl)prop-2-en-1-one ( 3j ), ( E )-1-(1-ethyl-1 H -pyrrol-2-yl)-3-phenylprop-2-en- 1-one ( 4a ), ( E )-3-(4-bromophenyl)-1-(1-ethyl-1 H -pyrrol-2-yl)prop-2-en-1-one ( 4e ), (
Synthesis and odor characteristics of
<scp>
<i>N</i>
‐substituted
</scp>
pyrrolyl ketones derived from
<scp>
<i>N</i>
‐substituted
</scp>
acetylpyrroles and alcohols
作者:Mingqin Zhao、Jingyi Hu、Xiaoming Ji、Lu Han、Mengxiao Li、Miao Lai
DOI:10.1002/jhet.4612
日期:——
A transition-metal and ligand free base-mediated a radical condensation reaction to form N-substituted pyrrolyl ketones with water as the side product is developed. The transformation is performed with t-BuOK, and a broad range of N-substituted acetylpyrroles and alcohols are well tolerated under the optimized conditions. Preliminary studies indicate that the radical anion of the benzylic alcohol is
Cobalt-Catalyzed Regioselective Direct C-4 Alkenylation of 3-Acetylindole with Michael Acceptors Using a Weakly Coordinating Functional Group
作者:Shyam Kumar Banjare、Tanmayee Nanda、P. C. Ravikumar
DOI:10.1021/acs.orglett.9b03243
日期:2019.10.4
Herein, we disclosed the first report on the selective C(4)-H functionalization of 3-acetylindole derivatives using first-row transition metal cobalt where an acetyl group is acting as a weakly coordinating directing group. Selective C(4)-H functionalization has been achieved using diverse Michael acceptors (acrylate and maleimide) simply by switching the additive from copper acetate to silver carbonate. Further the formation of acobaltacycle intermediate was also detected through HRMS for mechanistic insight.
γ-Carboline synthesis enabled by Rh(<scp>iii</scp>)-catalysed regioselective C–H annulation
作者:Bo Jiang、Jingwen Jia、Yufei Sun、Yichun Wang、Jing Zeng、Xiubin Bu、Liangliang Shi、Xiaoying Sun、Xiaobo Yang
DOI:10.1039/d0cc04740f
日期:——
A Rh(iii)-catalysed C–H annulation of indolyl oximes with alkynyl silanes was developed, delivering diverse γ-carbolines with unexpected reverse regioselectivity.
Synthesis and biological evaluation of 3-(1H-indol-3-yl)pyrazole-5-carboxylic acid derivatives
作者:Datong Zhang、Guangtian Wang、Chubing Tan、Weiren Xu、Yuan Pei、Lingyan Huo
DOI:10.1007/s12272-011-0301-2
日期:2011.3
A series of novel compounds bearing a 3-(1H-indol-3-yl)pyrazole-5-carboxylic acid nucleus were synthesized. Analytical and spectral data confirmed the structures of the new compounds. The structures of the regioisomers in this series were determined by 1H-NMR spectra. The title compounds were evaluated for their endothelin-1 antagonist activities. In the in vitro functional assay, compounds 23, 24