Results 41 to 50 of about 11,541 (257)
Predicting the UV–vis spectra of oxazine dyes [PDF]
Beilstein Journal of Organic Chemistry, 2011 In the current work we have investigated the ability of time-dependent density functional theory (TD-DFT) to predict the absorption spectra of a series of oxazine dyes and the effect of solvent on the accuracy of these predictions. Based on the results of this study, it is clear that for the series of oxazine dyes an accurate prediction of the ...
Fleming, Scott +2 more
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Solid-Phase Synthesis of ɤ-Lactone and 1,2-Oxazine Derivatives and Their Efficient Chiral Analysis. [PDF]
PLoS ONE, 2016 Derivatives of 3-methyl-3,6-dihydro-2H-1,2-oxazine-6-carboxylic acid prepared by regioselective hetero Diels-Alder reaction of arylnitroso compounds with sorbic acid were used for solid-phase synthesis of a library of derivatives that included ...
Sona Krupkova +7 more
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Synthesis of 2H‐1,4‐Oxazin‐3(4H)‐One Utilizing Umpolung Reaction to α‐Hydrazonoketone
Asian Journal of Organic Chemistry, Volume 14, Issue 3, March 2025.An Efficient Method of the Synthesis of a 2H‐1,4‐Oxazin‐3(4H)‐One via the Tandem N‐Alkylation/Reduction/N‐Acyl‐O‐Alkylation of α‐Hydrazonoketone Has Been Developed. This Reaction Proceeds Extremely Quickly Under Mild Conditions, in Particular, N‐Methylation Proceeds Quantitatively, Which Was Difficult to Achieve by Conventional Umpolung N‐Alkylation ...
Isao Mizota +7 more
wiley +1 more source
Organic Letters, 2016 The first general procedure for the synthesis of 5- to 7-membered cyclic iminoethers by microwave-assisted cyclization of ω-amido alcohols promoted by polyphosphoric acid (PPA) esters is presented. 2-Aryl-2-oxazolines and 5,6-dihydro-4H-1,3-oxazines were
María C Mollo, L. Orelli
semanticscholar +1 more source
Asian Journal of Organic Chemistry, EarlyView.(Z)‐2‐oxazolines are available in a stereoselective fashion by cyclization of propargylic amides with internal triple bonds in the presence of HCl generated in situ from hexafluoroisopropanol (HFIP) and TMSCl. Response surface methodology was crucial to optimize the reaction conditions.
Nicholas Jankowski, Norbert Krause
wiley +1 more source
E-Journal of Chemistry, 2012 A facile method for a mild single pot reductive cleavage of 1,2-oxazines to γ-hydroxy ketones was developed using zinc and aqueous ammonium chloride as the reagent in methanol.
P. Sunil Kumar, K. M. Lokanatha Rai
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Журнал органічної та фармацевтичної хімії, 2022 Aim. To analyze and summarize the synthetic potential of 1,2,3-triazole-4(5)-amines as efficient building blocks in the synthesis of triazolo-annulated pyridine, azine and azepine systems. Results and discussion.
Natalia O. Syrota +3 more
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Cytotoxicity of 2-oxazines and poly(2-oxazine)s in mouse fibroblast
, 2018 Poly(2-oxazoline)s are a polymer family that has received much attention in the last decade as biomaterials. In contrast, poly(2-oxazine)s, which can be viewed as their higher backbone homologue, have received much less attention. A first step towards the assessment as potential biomaterials is the evaluation of the cytotoxicity of the polymers ...
Zuzana Kroneková +3 more
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Chemistry – An Asian Journal, EarlyView.In this study, we synthesized hybrid benzoxazines from the bio‐phenolic compounds—vanillin, thymol, and carvacrol— Jeffamine D‐230, and paraformaldehyde through a Mannich reaction. The thermal polymerizations of the hybrid benzoxazines were analyzed using differential scanning calorimetry (DSC).
Merve Erdeger, Fusun Seyma Gungor
wiley +1 more source
Beilstein Journal of Organic Chemistry, 2016 Iodination of carbohydrate-derived 3,6-dihydro-2H-1,2-oxazines of type 3 using iodine and pyridine in DMF furnished 5-iodo-substituted 1,2-oxazine derivatives 4 with high efficacy. The alkenyl iodide moiety of 1,2-oxazine derivatives syn-4 and anti-4 was
Michal Medvecký +4 more
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