Results 31 to 40 of about 9,399 (254)

The [4+2]‐Cycloaddition of α‐Nitrosoalkenes with Thiochalcones as a Prototype of Periselective Hetero‐Diels–Alder Reactions—Experimental and Computational Studies [PDF]

open access: yes, 2020
The [4+2]‐cycloadditions of α‐nitrosoalkenes with thiochalcones occur with high selectivity at the thioketone moiety of the dienophile providing styryl‐substituted 4H‐1,5,2‐oxathiazines in moderate to good yields.
Boger D. L.   +8 more
core   +1 more source

Kinetic-spectrophotometric method for the determination of trace amounts of bromide in seawater [PDF]

open access: yes, 2005
A novel simple, sensitive and rapid kinetic-spectrophotornetric method is proposed for the determination of trace amounts of bromide. The method is based on its catalytic effect on the oxidation of methylene blue (MB) by hydrogen peroxide in strongly ...
Motomizu, Shoji   +4 more
core   +1 more source

3,4-Dihydro-2H-benzo[4,5]imidazo[2,1-b][1,3]thiazin-3-ol

open access: yesIUCrData, 2017
In the title compound, C10H10N2OS, the benzimidazole ring system is almost planar (r.m.s. deviation = 0.007 Å), whereas the heterocyclic six-membered thiazine ring has an envelope conformation, with the hydroxy-substituted C atom as the flap.
Latifa El Ouasif   +4 more
doaj   +1 more source

Crystal structures of rac-2,3-diphenyl-2,3,5,6-tetrahydro-4H-1,3-thiazine-1,1,4-trione and N-[(2S,5R)-1,1,4-trioxo-2,3-diphenyl-1,3-thiazinan-5-yl]acetamide

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2023
The syntheses and crystal structures of two thiazinone compounds, namely, rac-2,3-diphenyl-2,3,5,6-tetrahydro-4H-1,3-thiazine-1,1,4-trione, C16H15NO3S, in its racemic form, and N-[(2S,5R)-1,1,4-trioxo-2,3-diphenyl-1,3-thiazinan-5-yl]acetamide ...
Hemant P. Yennawar   +4 more
doaj   +1 more source

Harnessing visible light: enhancing TiO2 photocatalysis with photosensitizers for sustainable and efficient environmental solutions

open access: yesFrontiers in Chemical Engineering
The emerging field of using titanium dioxide (TiO2)-based photosensitizers for enhancing photocatalytic removal of thiazine dyes such as methylene blue (MB) from water has long been recognized for its exceptional photocatalytic properties, making it an ...
Nyiko M. Chauke   +3 more
doaj   +1 more source

Lysine Methylation is an Endogenous Post-Translational Modification of Tau Protein in Human Brain and a Modulator of Aggregation Propensity [PDF]

open access: yes, 2014
Poster Division: Biological Sciences: 1st Place (The Ohio State University Edward F. Hayes Graduate Research Forum)Alzheimer’s Disease (AD) is the most common form of dementia, affecting 13% of Americans aged at least 65 years and 43% of Americans aged ...
Cooper, Grace
core   +1 more source

Application of zeolite-Arthrobacter viscosus system for the removal of heavy metal and dye : chromium and azure B [PDF]

open access: yes, 2012
A hybrid system combining the ion-exchange properties of a NaY zeolite and the characteristics of the bacterium Arthrobacter viscosus was investigated to treat polluted effluents with dye and toxic metals.
Pazos, M.   +3 more
core   +1 more source

6-Bromo-4-(2-cyclohexylidenehydrazin-1-ylidene)-1-methyl-2,2-dioxo-3,4-dihydro-1H-2λ6,1-benzothiazine

open access: yesActa Crystallographica Section E, 2012
The asymmetric unit of the title compound, C15H18BrN3O2S, contains two independent molecules in both of which the (thiazine)C=N—N double bond exhibits an E conformation.
Muhammad Shafiq   +5 more
doaj   +1 more source

The structure of 2-​piperidinotricyclo[5.2.2.02.6]​undecan-​9-​on [PDF]

open access: yes, 1982
The title compd. is monoclinic, space group Cc, with a 24.28(4)​, b 8.76(6)​, c 14.03(2) Å, and β 108.00(9)​°; d.(exptl.) = 1.18 and d.(calcd.) = 1.16 for Z = 4 (2 mols.​/Z)​. The structure was detd.
Nirmala, K.A., Sake Gowda, D.S.
core   +1 more source

Synthesis of Polysubstituted Tetrahydro‐1,4‐Thiazepines by Rhodium‐Catalyzed Ring Expansion of Dihydro‐1,3‐Thiazines with Diazoesters

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
A rhodium(II)‐catalyzed ring expansion of stereodefined dihydro‐1,3‐thiazines with diazomalonates gives 1,4‐thiazepines via a sulfonium ylide rearrangement. The reaction shows a cis/trans reactivity divergence arising from different metal coordination, as revealed by experiments and density functional theory studies.
Laurine Tual   +3 more
wiley   +1 more source

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