Results 191 to 200 of about 11,863 (256)

Nucleophilic Halogenation of Cyclic Nitronates: A General Access to 3-Halo-1,2-Oxazines.

Journal of Organic Chemistry, 2019
In the article, comprehensive studies on the nucleophilic chlorination and bromination of readily available six-membered cyclic nitronates (1,2-oxazine-N-oxides) are reported.
R. S. Malykhin, Aleksandr O. Kokuev, Valentin S. Dorokhov, Y. Nelyubina, V. Tartakovsky, A. Tabolin, S. Ioffe, A. Sukhorukov   +7 more
semanticscholar   +1 more source

New photochromic 2H-1.4-oxazines and spiro-2H-1.4-oxazines

Tetrahedron Letters, 1981
Abstract The synthesis and the photochemical behaviour of 4 new 2H-1.4-oxazines and 3 new spiro-2H-1.4-oxazines is described.
Ulrich-W. Grummt, Manfred Reichenbächer, Roland Paetzold   +2 more
openaire   +1 more source

A Review on Current Synthetic Strategies of Oxazines

Mini-Reviews in Organic Chemistry, 2018
In the past three decades, the heterocyclic oxazine cores have been intensely concerned. Oxazine derivatives are promising vital heterocyclic motifs. They are eminent for their synthetic potential and extensive biological properties.
S. Gaonkar, Vignesh U Nagaraj, Swarnagowri Nayak   +2 more
semanticscholar   +1 more source

Oxazine 170 Induces DNA:RNA:DNA Triplex Formation

Journal of Medicinal Chemistry, 2005
The oxazine dye (Oxazine 170) was found to induce formation of a hybrid triplex structure, poly rA:(poly dT)(2), under solution conditions in which the triplex would not otherwise form. Formation of the hybrid triplex is driven by the structural selective binding of oxazine 170 to poly rA:(poly dT)(2).
Guangtao, Song, Feifei, Xing, Xiaogang, Qu, Jonathan B, Chaires, Jinsong, Ren   +4 more
openaire   +2 more sources

Formation of oxazine dye by photochemical reaction of N-acyl oxazine derivatives

Journal of Photochemistry and Photobiology A: Chemistry, 2007
The synthesis and photochemical reaction mechanism of N-benzoyl oxazine derivatives have been investigated. The synthesized materials were found to be photosensitive and capable of generating oxazine dye upon light irradiation. The initial reactions were found to include homolytic bond cleavage between the oxazine nitrogen and benzoyl carbon atoms ...
Masaharu Akiba, Alexander S. Dvornikov, Peter M. Rentzepis   +2 more
openaire   +1 more source

Green synthesis of 1,3-oxazines by visible light-promoted catalyst-free C–H activation/cyclization of tertiary amines

Environmental Chemistry Letters, 2021
B. Saikia, Mohit L. Deb, P. Baruah
semanticscholar   +1 more source

Synthesis of Chiral Helical 1,3-Oxazines

Organic Letters, 2012
A series of novel 1,3-oxazines were prepared to construct a helical framework. The 1,3-oxazine attached to the phenanthrene unit showed a small bite angle θ (∼12°), while the units attached to [4]helicene showed a larger θ (∼35°) and exhibited helical isomers at ambient conditions.
Harish R, Talele, Sibaprasad, Sahoo, Ashutosh V, Bedekar   +2 more
openaire   +2 more sources

Insights into the isomerization of photochromic oxazines from the excitation dynamics of BODIPY–oxazine dyads

Physical Chemistry Chemical Physics, 2012
We synthesized five BODIPY-oxazine dyads in one to four synthetic steps from known precursors. They differ in the nature of the unsaturated spacer linking the oxazine photochrome to either the conjugated framework or the boron center of the BODIPY fluorophore.
Deniz E, Battal M, Cusido J, SORTINO, Salvatore, Raymo FM   +4 more
openaire   +2 more sources

Recent progress in multi-stimulable photochromic oxazines with their wide-ranging applications

, 2021
Gurleen Kaur Gulati, Loveleen Kaur Gulati, Satish Kumar   +2 more
semanticscholar   +1 more source

ChemInform Abstract: DIHYDRO‐1,3‐OXAZINE 12. MITT. DIE OXAZIN‐ALPHA‐CARBANION‐KETENIMIN‐UMLAGERUNG

Chemischer Informationsdienst. Organische Chemie, 1971
AbstractDie beiden Dihydro‐1,3‐oxazine (Ia) und (Ib) reagieren mit Butyllithium/Amyljodid zu den Substitutionsprodukten (IIa) und (IIb) die durch Natriumboranat zu den Aldehyden (IIIa) und (IIIb) reduktiv gespalten werden.
A. I. MYERS, E. M. SMITH
openaire   +1 more source