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Regio- and diastereoselective synthesis of novel polycyclic pyrrolo[2,1- a]isoquinolines bearing indeno[1,2- b]quinoxaline moieties by a three-component [3+2]-cycloaddition reaction
, Article Synlett ; Volume 31, Issue 3 , 2020 , Pages 267-271 ; Moafi, A ; Jafari, B ; Vilinger, A ; Langer, P ; Sharif University of Technology
Georg Thieme Verlag
2020
Abstract
A regio- and diastereoselective synthesis of 2,3-dihydro-10b′ H -spiro[indeno[1,2- b ]quinoxaline-11,1′-pyrrolo[2,1- a ]isoquinoline]-2′,3′-diylbis(phenylmethanone) derivatives containing four contiguous chiral stereocenters was achieved through 1,3-dipolar cycloaddition of isoquinolinium N -ylides in a one-pot three-component reaction. The desired products were obtained in short reaction times and in moderate to high yields (up to 92%) under relatively mild reaction conditions. The structure and relative stereochemistry of the desired product was confirmed by X-ray diffraction analysis. © 2020 Georg Thieme Verlag. All rights reserved
Light olefin production on the Co-Ni catalyst: Calcination conditions, and modeling and optimization of the process conditions by a statistical method
, Article New Journal of Chemistry ; Volume 44, Issue 18 , 2020 , Pages 7467-7483 ; Akbari, M ; Mirzaei, N ; Abdouss, M ; Sharif University of Technology
Royal Society of Chemistry
2020
Abstract
The present work is comprised of two main parts. In part 1 the Co-Ni/γ-Al2O3 catalyst was prepared using a sol-gel procedure. Then the effect of calcination variables including the calcination temperature and time on the catalytic performance for production of light olefins was investigated and optimized. The obtained results have shown that the catalyst which was calcined at 550 °C for 6 h has revealed the better catalytic performance for production of light olefins. In part 2 the effect of process conditions including the reaction temperature, H2/CO feed ratio and total reaction pressure on the catalytic performance (CO conversion%, (C2-C4) selectivity% and C5+ selectivity%) was...