Base-Promoted Intermolecular Cyclization of Substituted 3-Aryl(Heteroaryl)-3-chloroacrylaldehydes and Tetrahydroisoquinolines: An Approach to Access Pyrrolo[2,1-<i>a</i>]isoquinolines
作者:Ziqi Yang、Ning Lu、Zhonglin Wei、Jungang Cao、Dapeng Liang、Haifeng Duan、Yingjie Lin
DOI:10.1021/acs.joc.6b01781
日期:2016.12.2
We have developed a new base-promoted intermolecular cascade cyclization reaction of substituted 3-aryl(heteroaryl)-3-chloroacrylaldehydes and tetrahydroisoquinolines in one pot. The reaction provides a facile and practical synthesis of pyrrolo[2,1-a]isoquinolines. A number of pyrrolo[2,1-a]isoquinolines were synthesized in moderate to high yields (up to 97%).
我们已经开发了一种新的碱促进的在一锅中取代的3-芳基(杂芳基)-3-氯丙烯醛和四氢异喹啉的分子间级联环化反应。该反应提供了吡咯并[2,1- a ]异喹啉的简便实用的合成方法。合成了许多吡咯并[2,1- a ]异喹啉,中度至高产率(高达97%)。
Design, synthesis, and biological evaluation of thiophene analogues of chalcones
作者:Romeo Romagnoli、Pier Giovanni Baraldi、Maria Dora Carrion、Carlota Lopez Cara、Olga Cruz-Lopez、Delia Preti、Manlio Tolomeo、Stefania Grimaudo、Antonella Di Cristina、Nicola Zonta、Jan Balzarini、Andrea Brancale、Taradas Sarkar、Ernest Hamel
DOI:10.1016/j.bmc.2008.04.026
日期:2008.5
Chalcones are characterized by possessing an enone moiety between two aromatic rings. A series of chalcone-like agents, in which the double bond of the enone system is embedded within a thiophene ring, were synthesized and evaluated for antiproliferative activity and inhibition of tubulin assembly and colchicine binding to tubulin. The replacement of the double bond with a thiophene maintains antiproliferative activity and therefore must not significantly alter the relative conformation of the two aryl rings. The synthesized compounds were found to inhibit the growth of several cancer cell lines at nanomolar to low micromolar concentrations. In general, all compounds having significant antiproliferative activity inhibited tubulin polymerization with an IC50 < 2 mu M. Several of these compounds caused K562 cells to arrest in the G2/M phase of the cell cycle. (C) 2008 Elsevier Ltd. All rights reserved.
A novel transformation of 2-acetylthiophene and its halogen derivatives under Vilsmeier reaction conditions
作者:Valerii Z. Shirinian、Leonid I. Belen’kii、Mikhail M. Krayushkin
DOI:10.1070/mc2002v012n01abeh001529
日期:2002.1
Under conditions of the Vilsmeier reaction either beta-chloro-beta-(2-thienyl)acrylic aldehydes or N,N-dimethyl-2-thiophenecarboxamides can be synthesised from 2-acetylthiophenes depending on the reaction temperature and time.
Stereoselective One-Pot Sequential Dehydrochlorination/<i>trans</i>
-Hydrofluorination Reaction of β-Chloro-α,β-unsaturated Aldehydes or Ketones: Facile Access to (<i>Z</i>
)-β-Fluoro-β-arylenals/β-Fluoro-β-arylenones
作者:Jingli Zhang、Liran Liu、Junxin Duan、Lianghu Gu、Bifeng Chen、Taolei Sun、Yuefa Gong
DOI:10.1002/adsc.201700981
日期:2017.12.19
high potential as a fluorinated synthon in organic synthesis. However, control of the Z/E stereoselectivity of multi‐substituted monofluoroalkene products in one‐pot reactions still remains a challenge. An unprecedented one‐pot approach for the highly regio‐ and stereoselective preparation of functionalized (Z)‐β‐monofluoro tri‐substituted alkenesfrom readily available β‐chloro‐α,β‐unsaturated aldehydes
Efficient Synthesis of 4- and 5-Substituted 2-Aminopyrimidines by Coupling of β-Chlorovinyl Aldehydes and Guanidines
作者:Anna S. Komendantova、Alexander V. Komkov、Yulia A. Volkova、Igor V. Zavarzin
DOI:10.1002/ejoc.201700737
日期:2017.8.10
A general, practical and simple synthesis of functionalized 2-aminopyrimidines starting from β-chlorovinyl aldehydes and amidines is reported. In the presence of potassium carbonate, various ketones have been efficiently incorporated into the pyrimidine derivatives by two-step sequence involving the Vilsmeier-Haack reaction followed by the condensation with guanidines. The protocol is distinguished