Results 111 to 120 of about 6,902 (250)
Studies on 1,4-benzothiazines. II. Acetylation of 2,3-dihydro-3-imino-4H-1,4-benzothiazine.
Chemical and Pharmaceutical Bulletin, 1979 In a previous paper, we described the formation of the 8, 5-diazaphenothiazino [8, 7-h]-phenothiazine derivative (2) by acetylation of 2, 3-dihydro-3-imino-4-methyl-4H-1, 4-benzothiazine (1a). This paper deals with the acetylation of the desmethyl derivative (1b). When a suspension of 1b in acetic anhydride was heated under reflux for 2 hr, the bis [1,
HIROSHI HIRANO +3 more
openaire +2 more sources
The Effect of Hair Color on the Incorporation of Codeine into Human Hair [PDF]
, 2017 The influence of melanin on the binding of xenobiotics in hair will impact the interpretation of drug concentrations determined by hair testing. The purpose of this study was to determine if codeine, as a model compound of abused drugs, would be ...
Augsburger, Marc P. +7 more
core
Fossilization of melanosomes via sulfurization [PDF]
, 2016 Fossil melanin granules (melanosomes) are an important resource for inferring the evolutionary history of colour and its functions in animals. The taphonomy of melanin and melanosomes, however, is incompletely understood.
Bull, Ian D. +6 more
core +4 more sources
Acta Crystallographica Section E: Crystallographic Communications, 2016 A new 2:1 co-crystal of piroxicam and gentisic acid [systematic name: 4-hydroxy-1,1-dioxo-N-(pyridin-2-yl)-2H-1λ6,2-benzothiazine-3-carboxamide–2-(4-oxido-1,1-dioxo-2H-1λ6,2-benzothiazine-3-amido)pyridin-1-ium–2,5-dihydroxybenzoic acid, 2C15H13N3O4S ...
Elizabeth M. Horstman +3 more
doaj +1 more source
Вивчення закономірностей зв’язку структура – аналгетична активність у серії 4-гідрокси-N-(піридин-2-іл)-2,2-діоксо-1H-2λ6,1-бензотіазин-3-карбоксамідів [PDF]
, 2015 Continuing the search for new analgesics and with the purpose of revealing the structural-biological regularities, which are important for further studies, the synthesis of a series of 4-hydroxy-N-(pyridin-2-yl)-2,2-dioxo-1H-2λ6,1-benzothiazine-3 ...
Davydenko, O. O. +3 more
core +2 more sources
Quinazolino Benzothiazine Derivatives. Part II
, 1976 Department of Chemistry, Punjab University, Chandigarh-14 Manuscript received 19 May 1975; revised 5 December 1975; accepted 28 January 1976 Anthranilic acids (III) on condensation with isatoic anhydride (II) furnish Anthraniloyl anthranilic acids (V), which on reaction with carbon disulphide/sodium hydroxide give 2-thio-3(2'-carboxy phenyl) 1, 2, 3, 4-
SARDUL SINGH +2 more
openaire +1 more source
3,3,6-Tribromo-1-methyl-1H-2,1-benzothiazin-4(3H)-one 2,2-dioxide
Acta Crystallographica Section E, 2010 In the title compound, C9H6Br3NO3S, a halogenated benzothiazine derivative, the thiazine ring adopts a sofa conformation. The crystal studied was a racemic twin with a contribution of 72 (1)% of the major domain.
Ghulam Mustafa +3 more
doaj +1 more source
Síntese de 2-Quinolinonas análogos de cumarinas isoladas de polygala sabulosa [PDF]
, 2009 TCC (graduação) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Curso de Química.A espécie Polygala sabulosa, conhecida popularmente como “Timuto Pinheirinho” é uma pequena erva que cresce no sul meridional montanheiro
Espindola, Leandro
core
, 2019 In order to study polymorphic modifications of N-(4-trifluoromethylphenyl)-4-hydroxy-2,2-dioxo-1H-2λ6,1-benzothiazine-3-carboxamide, which is of interest as a promising analgesic, its three colorless crystal forms with different habitus have been ...
I. Ukrainets +7 more
semanticscholar +1 more source
Photoprotection:extending lessons learned from studying natural sunscreens to the design of artificial sunscreen constituents [PDF]
, 2017 Ultrafast pump–probe spectroscopies and computational chemistry unravel the excited state photophysics responsible for the photostability of molecules in natural and commercial sunscreens.
Ashfold, Michael N R +4 more
core +1 more source