Results 181 to 190 of about 11,863 (256)

Fluorescence activation with switchable oxazines

Chemical Communications, 2018
Activatable fluorophores allow the spatiotemporal control of fluorescence required to acquire subdiffraction images, highlight cancer cells and monitor dynamic ...
Yang Zhang   +4 more
openaire   +3 more sources

Copper-Catalyzed Aminosulfonylation of O-Homoallyl Benzimidates with Sodium Sulfinates to Access Sulfonylated 1,3-Oxazines.

Organic Letters, 2021
A facile copper-catalyzed aminosulfonylation of O-homoallyl benzimidates with sodium sulfinates in the presence of tert-butyl peroxybenzoate (TBPB) and XPhos ligand has been developed.
W. Dong   +8 more
semanticscholar   +1 more source

Medicinal chemistry of oxazines as promising agents in drug discovery

Chemical Biology and Drug Design, 2020
Oxazines have brought much synthetic interest due to their extensive biological activities. These are the important category of heterocycles, which may be formally derived from benzene and its reduction products by convenient substitution of carbon (and ...
D. Zinad   +4 more
semanticscholar   +1 more source

A One-Pot Reaction of α-Imino Rhodium Carbenoids and Halohydrins: Access to 2,6-Substituted Dihydro-2H-1,4-oxazines.

Organic Letters, 2020
Herein, we report a Rh(II)-catalyzed reaction between 1-tosyl-1,2,3-triazoles and halohydrins to provide 2,6-substituted 3,4-dihydro-2H-1,4-oxazines under basic conditions.
Kieran D. Jones   +7 more
semanticscholar   +1 more source

Unexpected Reactivity Switch in the Statistical Copolymerization of 2-Oxazolines and 2-Oxazines Enabling the One-Step Synthesis of Amphiphilic Gradient Copolymers.

Journal of the American Chemical Society, 2019
Poly(2-oxazoline)s and, more recently, also poly(2-oxazine)s represent an emerging class of polymers with a broad range of applications. Surprisingly, to date, the statistical copolymerization of these two cyclic imino ether monomers has not yet been ...
O. Sedláček   +5 more
semanticscholar   +1 more source

Chromogenic Oxazines for Cyanide Detection

The Journal of Organic Chemistry, 2005
[reaction: see text] We have designed two heterocyclic compounds for the colorimetric detection of cyanide. The skeleton of both molecules fuses a benzooxazine ring to an indoline fragment and can be assembled efficiently in three synthetic steps starting from commercial precursors.
Tomasulo M   +3 more
openaire   +2 more sources

1,3-Oxazine Derivatives

1963
Publisher Summary This chapter discusses the methods of preparation and chemical properties of 1,3-oxazine derivatives. One of the derivatives discussed is tetrahydro-1,3-oxazines. The methods employed for the preparation of tetrahydro-1,3-oxazines include cyclization, hydrogenation, or other addition to the double bond of unsaturated 1,3-oxazines ...
Z, ECKSTEIN, T, URBANSKI
openaire   +2 more sources

Visible-Light Catalytic Photooxygenation of Monoterpene Indole Alkaloids: Access to Spirooxindole-1,3-oxazines.

Chemistry, 2018
Few natural oxindole alkaloids possess an exceptional spiro-[(1,3)oxazinan-3,6'-oxindole] core structure, which results from an unusual oxidative indole rearrangement.
Thorsten von Drathen   +2 more
semanticscholar   +1 more source

Neuartige Oxazin‐Synthese

Chemische Berichte, 1980
New Oxazine SynthesisThe dialkylcyanamides 2 react with derivatives of o‐chloro‐carboxylic acids 1 and 5a,b to give benzoxazine 3 and the benzothieno‐oxazines 6 and 7. The chloride 5c reacts with 2 to form the carbimidoyl chlorides 8.
Walter Ried   +3 more
openaire   +1 more source

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