Results 11 to 20 of about 11,863 (256)
Pd(II)/PIDA-Enabled Migratory Triple Functionalization of Terminal Alkenes via a 1,2-C/Pd(IV) Dyotropic Rearrangement. [PDF]
Angew Chem Int Ed EnglPd‐catalyzed reaction of homoallylic amides with phenyliodine(III) diacetate (PIDA) under Pd(II) catalysis delivers 6‐acetoxylated 5,6‐dihydro‐4H‐1,3‐oxazines through the formation of one C─C and two C─O bonds. Abstract We report a Pd(II)‐catalyzed migratory triple functionalization of terminal alkenes.
Liu CX, Wang Q, Zhu J.
europepmc +3 more sources
A Non-Antigenic Randomized Polyethylene Glycol/Poly(2-Phenyl-2-Oxazine)-Based Drug Delivery Platform
Macromolecular Rapid Communications, EarlyView.Randomized PEG (rPEG), a conceptually new PEG alternative, is combined with poly(2‐phenyl‐2‐oxazine) (PPheOzi) to establish an rPEG‐b‐PPheOzi‐b‐rPEG micellar drug delivery platform. The PPheOzi block enables high drug loadings, while competitive ELISA reveals a drastic reduction in anti‐PEG antibody affinity of rPEG in comparison to PEG.
J. R. Schmidt +6 more
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Switchable Coumarins for Ratiometric pH Sensing
Frontiers in Materials, 2021 A fluorescent chromophore and a pH-sensitive heterocycle were integrated within a single covalent skeleton to generate four molecular switches with ratiometric fluorescence response.
Mercedes M. A. Mazza +7 more
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Chemistry Proceedings, 2022 The reductive cyclization of different organic nitro compounds by carbon monoxide, catalyzed by transition metal complexes, is a very efficient and clean strategy for the synthesis of many N-heterocycles.
Fabio Ragaini +2 more
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Molecules, 2021 In this study, we used oxazinethione as a perfect precursor to synthesize new pyrimidine and pyrazole derivatives with potent biological activities. Biological activities were determined for all compounds against A. flavus, E. coli, S.
Magda H. Abdellattif +3 more
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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
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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
openaire +5 more sources