A Facile Synthesis of 2H-Chromenes and 9-Functionalized Phenanthrenes through Reactions between α,β-Unsaturated Compounds and Arynes
作者:Tiexin Zhang、Xian Huang、and Luling Wu
DOI:10.1002/ejoc.201200042
日期:2012.6
Facile syntheses of 2H-chromenes or 9-functionalizedphenanthrenes under mild conditions in moderate to good yields have been developed. They each involve annulations of arynes with α,β-unsaturatedcompounds bearing different electron-withdrawing groups (EWGs). Depending on the natures of the different EWGs, the reactions proceed by different pathways: enals react with arynesthrough a tandem [2+2]
Copper triflate-mediated synthesis of 1,3,5-triarylpyrazoles in [bmim][PF6] ionic liquid and evaluation of their anticancer activities
作者:V. Kameshwara Rao、Rakesh Tiwari、Bhupender S. Chhikara、Amir Nasrolahi Shirazi、Keykavous Parang、Anil Kumar
DOI:10.1039/c3ra41830h
日期:——
A simple, efficient, and environment friendly protocol for the synthesis of 1,3,5-triarylpyrazole and 1,3,5-triarylpyrazolines in [bimm][PF6] ionic liquid mediated by Cu(OTf)2 is described. The reaction protocol gave 1,3,5-triarylpyrazoles in good to high yields (71-84%) via a one-pot addition-cyclocondensation between chalcones and arylhydrazines, and oxidative aromatization without requirement for
three-component approach for the stereoselective synthesis of pyrrolo[2,1-a]isoquinolines from readily available isatins, chalcones and 1,2,3,4-tetrahydroisoquinoline without using a metal catalyst or additive. The synthetic methodology was found to be equally successful with differently functionalised secondary amines. A series of pyrrolo[2,1-a]isoquinolines were synthesised in good yields (up to 87%)
这项新研究描述了一种有效的三组分方法,用于从容易获得的靛红、查耳酮和 1,2,3,4-四氢异喹啉立体选择性合成吡咯并 [ 2,1- a ] 异喹啉,而无需使用金属催化剂或添加剂。发现合成方法对于不同官能化的仲胺同样成功。以良好的收率(高达 87%)合成了一系列吡咯并 [2,1- a ] 异喹啉,并且在所有情况下仅形成单一的非对映异构体产物。从所获得的配体和受体之间的相互作用的综合分析,在硅片 ACP 还原酶 (4OHU) 活性位点上的分子对接表明我们合成的化合物比标准药物利福平具有更好的抗结核特性。