Oxidation of 3-aryl-1H-benzo[f]chromenes with Koser’s reagent – synthesis of benzoflavylium tosylates
Sign Up to like & getrecommendations! Published in 2020 at "Chemistry of Heterocyclic Compounds"
DOI: 10.1007/s10593-020-02705-5
Abstract: The oxidation of 3-aryl-1H-benzo[f]chromenes with Koser’s reagent in methanol afforded a series of benzoflavylium tosylates. This reaction is the first example of the use of polyvalent iodine compounds to access arene-condensed pyrylium salts. read more here.
Keywords: koser reagent; oxidation aryl; benzoflavylium tosylates; chromenes koser ... See more keywords
Synthesis of bioactive 2-(2-(difluoromethoxy)aryl)benzo[d]thiazole derivatives via base-promoted one-pot process
Sign Up to like & getrecommendations! Published in 2019 at "Tetrahedron"
DOI: 10.1016/j.tet.2019.130472
Abstract: Abstract A convenient synthesis of 2-(2-(difluoromethoxy)aryl)benzo[d]thiazoles from 2- (o-hydroxyaryl)benzothiazoles and commercially available ethyl difluoroiodoacetate (ICF2CO2Et) is described. The transformation was amenable to a one-pot, sequential three-component protocol from o-hydroxybenzaldehyde, o-aminothiophenol, and ICF2CO2Et promoted by KOH.… read more here.
Keywords: synthesis; aryl benzo; difluoromethoxy aryl; one pot ... See more keywords
Three-Component One-Pot Construction of 2-Aryl-4H-benzo[4,5]thiazolo[3,2-a]pyrimidines Using Solid Calcium Carbide as a Surrogate of Gaseous Acetylene.
Sign Up to like & getrecommendations! Published in 2022 at "Organic letters"
DOI: 10.1021/acs.orglett.2c02331
Abstract: A concise method for the construction of 2-aryl-4H-benzo[4,5]thiazolo[3,2-a]pyrimidines using solid calcium carbide instead of gaseous acetylene as an alkyne source and 2-aminobenzothiazoles and aromatic aldehydes as substrates through one-pot three-component cascade reactions is described. The… read more here.
Keywords: using solid; aryl benzo; benzo thiazolo; pyrimidines using ... See more keywords
Cu/Fe/O=PPh3-catalyzed etherification for the synthesis of aryl 3-benzo[b]thienyl ethers
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DOI: 10.1246/cl.180425
Abstract: Cu/Fe-cocatalyzed cross-coupling reactions between 3-bromobenzo[b]thiophene and hydroxyaryls are described herein. The combination of Cu and Fe catalysts is important for the progress of the reacti... read more here.
Keywords: etherification synthesis; benzo thienyl; catalyzed etherification; aryl benzo ... See more keywords
A simple green protocol for the synthesis of ethyl 3-amino-1-aryl-1H-benzo[f] chromene-2-carboxylates in aqueous media
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DOI: 10.3184/174751917x15016663252830
Abstract: An eco-friendly and efficient straightforward method has been developed for the synthesis of ethyl 3-amino-1-aryl-1H-benzo[f]chromene-2-carboxylate derivatives via 1,4-diazabicyclo[2.2.2]octane (DABCO)-catalysed cyclisation of β-naphthol and 3-aryl-2-cyanoacrylates using water as a green solvent. All products precipitated from the… read more here.
Keywords: amino aryl; ethyl amino; benzo chromene; aryl benzo ... See more keywords
4-(Aryl)-Benzo[4,5]imidazo[1,2-a]pyrimidine-3-Carbonitrile-Based Fluorophores: Povarov Reaction-Based Synthesis, Photophysical Studies, and DFT Calculations
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DOI: 10.3390/molecules27228029
Abstract: A series of novel 4-(aryl)-benzo[4,5]imidazo[1,2-a]pyrimidine-3-carbonitriles were obtained through the Povarov (aza-Diels–Alder) and oxidation reactions, starting from benzimidazole-2-arylimines. Based on the literature data and X-ray diffraction analysis, it was discovered that during the Povarov reaction, [1,3]… read more here.
Keywords: povarov reaction; spectroscopy; aryl benzo; benzo imidazo ... See more keywords
One-pot syntheses of blue-luminescent 4-aryl-1H-benzo[f]isoindole-1,3(2H)-diones by T3P® activation of 3-arylpropiolic acids
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DOI: 10.3762/bjoc.13.231
Abstract: In situ activation of 3-arylpropiolic acids with T3P® (n-propylphosphonic acid anhydride) initiates a domino reaction furnishing 4-arylnaphtho[2,3-c]furan-1,3-diones in excellent yields. Upon employing these anhydrides as reactive intermediates blue-luminescent 4-aryl-1H-benzo[f]isoindole-1,3(2H)-diones are formed by consecutive pseudo three-component… read more here.
Keywords: arylpropiolic acids; activation arylpropiolic; benzo isoindole; luminescent aryl ... See more keywords