The reaction of ethyl 2-oxo-3-(4-oxo-4Н-chromen-2-yl)propanoates with S-methylisothiosemicarbazide hydroiodide
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DOI: 10.1007/s10593-018-2334-7
Abstract: Ethyl 2-oxo-3-(4-oxo-4Н-chromen-2-yl)propanoates reacted with S-methylisothiosemicarbazide hydroiodide at the ethoxalyl group, forming 3-methylsulfanyl-6-[(4-oxo-4Н-chromen-2-yl)methyl]-1,2,4-triazin-5(2H)-ones upon refluxing in pyridine (40–50% yields) or 6-[(4-oxo-4Н-chromen-2-yl)methyl]-1,2,4-triazine-3,5(2Н,4Н)-diones when refluxed in ethanol (37–74% yields). read more here.
Keywords: methylisothiosemicarbazide hydroiodide; ethyl oxo; chromen propanoates; oxo chromen ... See more keywords
Reaction of 2-cyano-3-(4-oxo-4H-chromen-3-yl)prop-2-enamide with some phosphorus reagents: synthesis of some novel diethyl phosphonates, 1,2,3-diazaphosphinanes, 1,2,3-thiazaphosphinine and 1,2-azaphospholes bearing a chromone ring
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DOI: 10.1007/s11164-017-3096-z
Abstract: Novel chromonyl phosphonic acid 3, diethyl chromonyl phosphonate 4, and diethyl chromonyl pyridinyl phosphonate 5 were obtained from treatment of 2-cyano-3-(4-oxo-4H-chromen-3-yl) prop-2-enamide (2) with phosphorous acid and its diesters. Also, an efficient route to functionalized… read more here.
Keywords: prop enamide; bearing chromone; oxo chromen; cyano oxo ... See more keywords
Novel copper(II), cobalt(II) and nickel(II) complexes with 5-(4-oxo-4H-chromen-3-yl)-4,5-dihydro-1,3,4-thiadiazole-2-carboxamide: Synthesis, structure, spectroscopic studies
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DOI: 10.1016/j.poly.2017.10.027
Abstract: Abstract A series of novel organic ligands, 5-(4-oxo-4H-chromen-3-yl)-4,5-dihydro-1,3,4-thiadiazole-2-carboxamide, which are the tautomeric forms of 2-oxo-2-(arylamino)-(2E)-2- [(4-hydroxy-2-oxo-2H-1-benzopyran-3-yl)-methyledene]ethanethioic acid hydrazides, have been synthesized from 3-formylchromone and oxamic acid thiohydrazides. Copper(II), cobalt(II) and nickel(II) complexes with 2-oxo-2-(arylamino)-(2E)-2-[(4-hydroxy-2-oxo-2H-1-benzopyran-3-yl)methyledene]ethanethioic acid… read more here.
Keywords: dihydro thiadiazole; copper; chromen dihydro; oxo chromen ... See more keywords
The crystal structures of two new coumarin derivatives: 2-(4-{2-[(2-oxo-2H-chromen-4-yl)oxy]acetyl}piperazin-1-yl)acetamide and N-(2,4-dimethoxybenzyl)-2-[(2-oxo-2H-chromen-4-yl)oxy]acetamide
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DOI: 10.1107/s2056989019003736
Abstract: The crystal structures of two 2-[(2-oxo-2H-chromen-4-yl)oxy]acetamide derivatives are described and the intermolecular contacts in the crystals analysed using Hirshfeld surface analysis and two-dimensional fingerprint plots. read more here.
Keywords: two new; oxo chromen; crystal structures; chromen oxy ... See more keywords
Crystal structure and Hirshfeld surface analysis of 2-[(2-oxo-2H-chromen-4-yl)oxy]acetic acid dimethyl sulfoxide monosolvate
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DOI: 10.1107/s2056989019009447
Abstract: The crystal structure of 2-[(2-oxo-2H-chromen-4-yl)oxy]acetic acid dimethylsulfoxide monosolvate is described and the intermolecular contacts in the crystal analysed using Hirshfeld surface analysis and two-dimensional fingerprint plots. read more here.
Keywords: oxo chromen; hirshfeld surface; chromen oxy; oxy acetic ... See more keywords