A triple cascade approach towards the diastereoselective synthesis of spiro <i>trans</i>-decalinol scaffolds
作者:Poorna Chandrasekhar Settipalli、Shaik Anwar
DOI:10.1039/d2cc03562f
日期:——
annulation reaction between cyclohexanone, β-nitrostyrene and 2-arylidene-1,3-indanedione afforded multisubstituted spiro trans-decalinol derivatives in high chemical yields (up to 75%) and excellent diastereoselectivity (up to >20 : 1) at room temperature. This one-pot three-component system follows a triple cascade sequence via the Michael/nitro-Michael/Aldol process, resulting in the formation of three C–C
DABCO-promoted highly diastereo- and regioselective construction of C-3 functionalized spirooxindoles <i>via</i> [3 + 2] cycloaddition of 2-aryl/heteroarylidene-1<i>H</i>-indene-1,3(2<i>H</i>)-diones with <i>N</i>-2,2,2-trifluoroethylisatin ketimines at ambient conditions
The application of 2-aryl/heteroarylidene-1H-indene-1,3(2H)-dione as an activated olefin source in the DABCO-catalyzed [3 + 2] cycloaddition with N-2,2,2-trifluoroethylisatin ketimines has been disclosed. This highly efficient 1,3-dipolar cycloaddition reaction offered a variety of trifluoro methyl group bearing spiro-pyrrolidine linked oxindoles with four consecutive stereocentres in good to excellent
Benzylidine indane-1,3-diones: As novel urease inhibitors; synthesis, in vitro, and in silico studies
作者:Bilquees Bano、Kanwal、Khalid Mohammed Khan、Farida Begum、Muhammad Arif Lodhi、Uzma Salar、Ruqaiya Khalil、Zaheer Ul-Haq、Shahnaz Perveen
DOI:10.1016/j.bioorg.2018.09.030
日期:2018.12
Current study deals with the evaluation of indane-1,3-dione based compounds as new class of urease inhibitors. For that purpose, benzylidine indane-1,3-diones (1-30) were synthesized and fully characterized by different spectroscopic techniques including EI-MS, HREI-MS, H-1, and C-13 NMR. All synthetic molecules 1-30 were evaluated for urease inhibitory activity and showed good to moderate inhibitory potential within the range of (IC50 = 11.60 +/- 0.3-257.05 +/- 0.7 mu M) as compared to the standard acetohydroxamic acid (IC50 = 27.0 +/- 0.5 mu M). Compound 1 (IC50 = 11.60 +/- 0.3 mu M) was found to be most potent inhibitor amongst all derivatives. The key binding interactions of most active compounds within the enzyme pocket were evaluated through in silico studies.
Oxa-Michael-Michael Reaction of MBH Alcohol and 2-Arylidene-1,3-indanedione: Regioselective Formal [4+2] Cycloaddition towards Tetrahydrospiropyran Scaffolds
Functionalized tetrahydrospiropyran derivatives can be easily accessed regioselectively by the use of nitrostyrene derived MBH alcohols and 2‐arylidene‐1,3‐indanediones in high chemical yields (up to 93 % yield). The synthetic utility of MBH alcohol as an ambiphilic substrate towards the synthesis of spirocyclic skeletons is noteworthy.
Design, Biological Evaluation, and Computer-Aided Analysis of Dihydrothiazepines as Selective Antichlamydial Agents
作者:Luana Janaína de Campos、Mohamed A. Seleem、Jiachen Feng、Kelly Mari Pires de Oliveira、João Víctor de Andrade dos Santos、Shivdeep Hayer、Jonathan B. Clayton、Sharvath Kathi、Derek J. Fisher、Scot P. Ouellette、Martin Conda-Sheridan
DOI:10.1021/acs.jmedchem.2c01894
日期:2023.2.9
of the main challenges of the current antichlamydial pharmacotherapy. The metabolic needs of CT are controlled, among others, by cylindricalproteases and their chaperones (e.g., ClpX). It has been shown that dihydrothiazepines can disrupt CT-ClpXP. Based on this precedent, we synthesized a dihydrothiazepine library and characterized its antichlamydialactivity using a modified semi-high-throughput