Articles with "acid catalysed" as a keyword



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Hydrolytic pre-treatment methods for enhanced biobutanol production from agro-industrial wastes.

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Published in 2018 at "Bioresource technology"

DOI: 10.1016/j.biortech.2017.09.132

Abstract: Brewery industry liquid waste (BLW), brewery spent grain (BSG), apple pomace solid wastes (APS), apple pomace ultrafiltration sludge (APUS) and starch industry wastewater (SIW) have been considered as substrates to produce biobutanol. Efficiency of hydrolysis… read more here.

Keywords: hydrolytic pre; treatment methods; agro industrial; industrial wastes ... See more keywords
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Experimental and theoretical investigations on acid catalysed stereoselective synthesis of new indazolyl-thiazole derivatives

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Published in 2018 at "Journal of Molecular Structure"

DOI: 10.1016/j.molstruc.2018.02.003

Abstract: Abstract 1-Arylidene-2-tetralone (2), obtained from condensation of 2-tetralone and aromatic aldehydes in acetic acid and HCl, on condensation with thiosemicarbazide in acidic and alkaline medium afforded tetrahydro-2H-benzo[e]indazole-2-carbothioamide as trans (3) and cis (4) diastereoisomers of… read more here.

Keywords: synthesis new; new indazolyl; theoretical investigations; experimental theoretical ... See more keywords
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Triflic acid catalysed regioselective synthesis of substituted naphthalenes by benzannulation of carbonyls with alkynes

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Published in 2021 at "Tetrahedron"

DOI: 10.1016/j.tet.2021.132214

Abstract: Abstract An interesting and facile triflic acid catalysed annulation of α-aryl carbonyls with arylalkynes is presented for the regioselective synthesis of substituted naphthalenes. The annulation reaction involves a sequence of electrophilic attack of carbonyl on… read more here.

Keywords: triflic acid; synthesis substituted; carbonyls; acid catalysed ... See more keywords
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Brønsted acid-catalysed enantioselective construction of axially chiral arylquinazolinones

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Published in 2017 at "Nature Communications"

DOI: 10.1038/ncomms15489

Abstract: The axially chiral arylquinazolinone acts as a privileged structural scaffold, which is present in a large number of natural products and biologically active compounds as well as in chiral ligands. However, a direct catalytic enantioselective… read more here.

Keywords: nsted acid; enantioselective construction; catalysed enantioselective; axially chiral ... See more keywords
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Solar-to-hydrogen peroxide energy conversion on resorcinol–formaldehyde resin photocatalysts prepared by acid-catalysed polycondensation

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Published in 2020 at "Communications Chemistry"

DOI: 10.1038/s42004-020-00421-x

Abstract: The photocatalytic generation of hydrogen peroxide from water and dioxygen (H 2 O + 1/2O 2  → H 2 O 2 , Δ G ° = +117 kJ mol –1 ) under sunlight is a promising strategy for the artificial photosynthesis of… read more here.

Keywords: hydrogen peroxide; acid catalysed; formaldehyde resin; resorcinol formaldehyde ... See more keywords
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Synthesis of 2,3-diaza-anthraquinones via the bidentate Lewis acid catalysed inverse electron-demand Diels–Alder (IEDDA) reaction

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Published in 2017 at "Organic chemistry frontiers"

DOI: 10.1039/c7qo00172j

Abstract: The bidentate bisborane Lewis acid catalysed inverse electron-demand Diels–Alder (IEDDA) reaction of 1,4-naphthoquinones (1,4-NQs) with 1,2,4,5-tetrazine (TZ) has been developed for the synthesis of 2,3-diaza-anthraquinones (2,3-DAAQs). Only due to the coordination of TZ with the… read more here.

Keywords: lewis acid; iedda reaction; reaction; diaza anthraquinones ... See more keywords
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Lewis acid catalysed asymmetric cascade reaction of cyclopropyl ketones: concise synthesis of pyrrolobenzothiazoles.

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Published in 2020 at "Chemical communications"

DOI: 10.1039/d0cc05667g

Abstract: Utilizing the C4 reactive site of cyclopropyl ketones and a chiral N,N'-dioxide-scandium(iii) complex as a catalyst, a concise ring-opening/cyclization/thio-Michael cascade method was developed for the synthesis of chiral benzothiazole derivatives from a simple 2-aminothiophenol material.… read more here.

Keywords: lewis acid; catalysed asymmetric; cyclopropyl; asymmetric cascade ... See more keywords
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B(3,4,5-F3H2C6)3 Lewis acid-catalysed C3-allylation of indoles.

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Published in 2023 at "Dalton transactions"

DOI: 10.1039/d3dt00745f

Abstract: Herein we report the B(3,4,5-F3H2C6)3-catalysed C3-allylation of indoles using allylic esters. 25 examples of C3-allylated products are presented in up to 97% yield. The mechanism for the reaction was explored using detailed Density Functional Theory… read more here.

Keywords: catalysed allylation; acid catalysed; lewis acid; f3h2c6 lewis ... See more keywords
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Acid-Catalysed Rearrangement of the Sandfly Pheromone Sobralene to Verticillenes, Consolidating its Relationship inter alia to the Taxanes and Phomactins

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Published in 2019 at "Synlett"

DOI: 10.1055/s-0039-1690131

Abstract: The sex-aggregation pheromone sobralene produced by the sandfly Lutzomyia longipalpis is isomerised to verticillenes in the presence of mild acid, thereby providing credence to the proposal that sobralene is a likely shunt metabolite of the… read more here.

Keywords: pheromone; catalysed rearrangement; rearrangement sandfly; acid catalysed ... See more keywords