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Fast and Stable Photochromic Oxazines. [PDF]
The Journal of Organic Chemistry, 2005 We have designed and synthesized two photochromic compounds incorporating fused indoline and benzooxazine fragments. Variable-temperature 1H NMR spectroscopy demonstrates that their central [1,3]oxazine ring opens thermally with free energy barriers ranging from 14 to 19 kcal mol(-1).
Tomasulo M +3 more
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Acta Crystallographica Section E: Crystallographic Communications, 2020 Molecules of the title compound, C16H16N2O2, occupy special positions on the twofold rotation axes. The heterocyclic ring adopts a slightly twisted envelope conformation with one of the two junction carbon atoms as the flap.
Emine Berrin Çınar +5 more
doaj +1 more source
SUBSTITUTED 4-NITROSOPYRAZOLES IN THE DIELS-ALDER REACTION
Siberian Journal of Life Sciences and Agriculture, 2021 Background. 4-Nitrosopyrazoles have become widespread in the pharmaceutical industry and in chemistry due to their high reactivity and biological activity. However, the interaction of 3,5-substituted 4-nitroso-1H-pyrazoles with diene hydrocarbons has not
Darya S. Volkova +4 more
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Interaction of 3H-furan-2-ones and 4-oxobutanoic acids with 2-(aminophenyl)methanol [PDF]
Известия Саратовского университета. Новая серия: Серия Химия. Биология. Экология, 2022 Reactions of 4-oxobutanoic acids as well as their cyclic analogues 3H-furan-2-ones with 1,3-binucleophilic reagent (2-aminophenyl) methanol lead to the formation of 1-R-5H-benzo[d]pyrrolo[2,1-b][1,3]oxazines and 3a-R-2,3,3a-trihydro-5H-benzo[d]pyrrolo[2 ...
Amalʼchieva, Olga A. +3 more
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Chemical Communications, 2013 The fundamental heterocyclic compound 1,4-oxazine has been generated using FVP. It is the first parent heterocycle among all the possible isomeric oxazines, thiazines and their heavier atom analogues to be characterised spectroscopically, and is shown to exist in solution entirely as the 4H-isomer.
Aitken, R Alan +4 more
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Molecules, 2009 Cyclization of hydrazones derived from 2-acetyl-1-naphthol and 1-acetyl-2-naphthol with triphosgene gave naphtho[1,2-e]-1,3-oxazines, naphtho[2,1-e]-1,3-oxazines or their spiro dimers depending on the molar ratio of triphosgene used for the cyclization.
Hamad Zaid Alkhathlan +5 more
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Applied Sciences, 2023 Currently, 1-amidoalkyl-2-naphthol derivatives are of increasing interest due to their biological activities and further use in the preparation of other important bioactive molecules, such as aminoalkyl naphthols and oxazines.
Hristo Petkov, Svilen P. Simeonov
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Frontiers in Pharmacology, 2018 Hepatocellular carcinoma (HCC) is a fatal disease and ranked fifth in cancer related mortality. Persistent activation of NF-κB is responsible for the oncogenesis, metastasis, tumor evasion, anti-apoptosis, angiogenesis and proliferation in HCC. Therefore,
Chakrabhavi Dhananjaya Mohan +19 more
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Antioxidants, 2019 The growing interest in the chemistry of unsaturated ring-fused 1,3-heterocycles, in this particular case 1,3-oxazines, arise in part from their versatile pharmacological applications.
Guadalupe Firpo +10 more
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Synthesis and Conformational Analysis of Naphthoxazine-Fused Phenanthrene Derivatives
Molecules, 2020 The synthesis of new phenanthr[9,10-e][1,3]oxazines was achieved by the direct coupling of 9-phenanthrol with cyclic imines in the modified aza-Friedel–Crafts reaction followed by the ring closure of the resulting bifunctional aminophenanthrols with ...
Khadija Belasri +6 more
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