An unusual synthesis of 3-(2-(arylamino)thiazol-4-yl)-2H-chromen-2-ones from ethyl 2-(chloromethyl)-2-hydroxy-2H-chromene-3-carboxylate via benzopyran ring opening
Sign Up to like & getrecommendations! Published in 2018 at "Molecular Diversity"
DOI: 10.1007/s11030-018-9880-x
Abstract: An unusual and unexpected synthesis of 3-(2-(arylamino)thiazol-4-yl)-2H-chromen-2-ones has been observed by the reaction of ethyl 2-(chloromethyl)-2-hydroxy-2H-chromene-3-carboxylate with various arylthioureas in ethanol under mild reaction conditions with excellent yields. The ambiguity in the structure of the… read more here.
Keywords: chloromethyl hydroxy; ethyl chloromethyl; arylamino thiazol; thiazol chromen ... See more keywords
An epigenetic modifier induces production of 3-(4-oxopyrano)-chromen-2-ones in Aspergillus sp. AST0006, an endophytic fungus of Astragalus lentiginosus.
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DOI: 10.1016/j.tet.2020.131525
Abstract: Incorporation of the epigenetic modifier suberoylanilide hydroxamic acid (SAHA) into a potato dextrose broth culture of the endophytic fungus Aspergillus sp. AST0006 affected its polyketide biosynthetic pathway providing two new 3-(4-oxopyrano)-chromen-2-ones, aspyranochromenones A (1) and… read more here.
Keywords: endophytic fungus; epigenetic modifier; aspergillus ast0006; oxopyrano chromen ... See more keywords
Oxidant-free, three-component synthesis of 7-amino-6H-benzo[c]chromen-6-ones under green conditions
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DOI: 10.1039/c9ra07108c
Abstract: Three-component synthesis of 7-amino-6H-benzo[c]chromen-6-ones was achieved under oxidant-free green conditions. read more here.
Keywords: amino benzo; benzo chromen; component synthesis; synthesis amino ... See more keywords
Synthesis, characterization and antioxidant activity of 3-(2-Amino-1,3-Selenazol-4-yl)-2H-chromen-2-ones derivatives
Sign Up to like & getrecommendations! Published in 2018 at "Sains Malaysiana"
DOI: 10.17576/jsm-2018-4702-17
Abstract: Selenocompounds have been widely synthesized for their potential in pharmacology. Ebselen, a selenazole oxide, is a glutathione peroxidase mimic which is known to possess high antioxidant activity. Four derivatives of 3-(2-amino-1,3- selenazol-4-yl)-2H-chromen-2-ones were synthesized by… read more here.
Keywords: antioxidant activity; amino selenazol; selenazol chromen; activity ... See more keywords
Substituted 4-Formyl-2H-chromen-2-ones: Their Reaction with N-(2,3,4,6-Tetra-Oacetyl- β-D-galactopyranosyl)thiosemicarbazide, Antibacterial and Antifungal Activity of Their Thiosemicarbazone Products
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DOI: 10.2174/1385272824999200812132256
Abstract: Several 6- and 7-alkoxy-2-oxo-2H-chromene-4-carbaldehydes were prepared from corresponding alkyl ethers of 6- and 7-hydroxy-4-methyl-2-oxo-2H-chromen-2-ones by oxidation using selenium dioxide. 6- and 7-Alkoxy-4-methyl-2H-chromenes were obtained with yields of 57-85%. Corresponding 4-carbaldehyde derivatives were prepared with yields… read more here.
Keywords: antibacterial antifungal; formyl chromen; reaction; substituted formyl ... See more keywords
Radical-Induced Cascade Annulation/Hydrocarbonylation for Construction of 2-Aryl-4H-chromen-4-ones
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DOI: 10.3390/molecules27217412
Abstract: A robust metal- and solvent-free cascade radical-induced C-N cleavage/intramolecular 6-endo-dig annulation/hydrocarbonylation for the synthesis of the valuable 2-aryl-4H-chromen-4-ones is described. This practical synthesis strategy utilizes propargylamines and air as the oxygen source and green carbonylation… read more here.
Keywords: radical induced; chromen ones; annulation hydrocarbonylation; aryl chromen ... See more keywords