Chemoselective and metal-free reduction of α,β-unsaturated ketones by <i>in situ</i> produced benzeneselenol from <i>O</i>-(<i>tert</i>-butyl) Se-phenyl selenocarbonate
The carbon–carbondouble bond of arylidene acetones and chalcones can be selectively reduced with benzeneselenol generated in situ by reacting O-(tert-butyl) Se-phenyl selenocarbonate with hydrochloric acid in ethanol. This mild, metal-free and experimentally simple reduction procedure displays considerable functional-group compatibility, products are obtained in good to excellent yields, and the use
Novel diarylheptanoids as inhibitors of TNF-α production
作者:Sameer Dhuru、Dilip Bhedi、Dnyaneshwar Gophane、Kiran Hirbhagat、Vijaya Nadar、Dattatray More、Sapna Parikh、Roda Dalal、Lyle C. Fonseca、Firuza Kharas、Prashant Y. Vadnal、Ram A. Vishwakarma、H. Sivaramakrishnan
DOI:10.1016/j.bmcl.2011.04.040
日期:2011.6
β-hydroxyketone by the reaction of substituted 4-phenyl butan-2-ones with pyridine-3-carboxaldehyde in presence of LDA and the subsequent dehydration of the same to obtain the α,β-unsaturated ketones. Compounds 4i, 5b, 5d, and 5g significantly inhibit lipopolysaccharide (LPS)-induced TNF-α production from human peripheral blood mononuclear cells in a dose-dependent manner. Of note, the in vitro TNF-α inhibition
Scalable Multicomponent Synthesis of (Hetero)aryl-Substituted Phenyls: Focus on Metal-Free Halogenated Biaryls, 3-Arylindoles, and Isourolithine A Synthesis
A simple, scalable and metal‐freemulticomponent enol acetylation of (hetero)arylidene acetones followed by a thermal Diels‐Alder reaction with methyl propiolate was accomplished in a pressure metal vessel. Aromatization of the cycloadduct intermediates yielded the corresponding functionalised (hetero)biaryls.
Rhenium(I)-Catalyzed Generation of α,β-Unsaturated Carbene Complex Intermediates from Propargyl Ethers for the Preparation of Cycloheptadiene Derivatives
作者:Hideyuki Sogo、Nobuharu Iwasawa
DOI:10.1002/anie.201604371
日期:2016.8.16
The rhenium(I)‐catalyzed generation of α,β‐unsaturated carbene complex intermediates from easily available propargyl ethers was achieved for the concise construction of cycloheptadiene derivativesthrough the formal [4+3] cycloaddition reaction with siloxydienes.
Discovery of curcumin inspired sulfonamide derivatives as a new class of carbonic anhydrase isoforms I, II, IX, and XII inhibitors
作者:P. V. Sri Ramya、Srinivas Angapelly、Andrea Angeli、Chander Singh Digwal、Mohammed Arifuddin、Bathini Nagendra Babu、Claudiu T. Supuran、Ahmed Kamal
DOI:10.1080/14756366.2017.1380638
日期:2017.1.1
inhibited by the new sulfonamides, with KIs in the range of 0.75-8.8 nM. hCA IX, a tumor-associated isoform involved in cancer progression and metastatic spread was potently inhibited by the new sulfonamides, with KIs in the range of 2.3-87.3 nM, whereas hCA XII, and antiglaucoma and anticancer drug target, was inhibited with KIs in the range of 6.1-71.8 nM. It is noteworthy that one of the new compounds