Results 231 to 240 of about 7,946 (266)
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Colorimetric Detection of Cyanide with a Chromogenic Oxazine
Organic Letters, 2005[reaction: see text] We have designed a chromogenic oxazine for the colorimetric detection of cyanide. Indeed, the [1,3]oxazine ring of our compound opens to form a 4-nitrophenylazophenolate chromophore in response to cyanide. This quantitative chromogenic transformation permits the detection of micromolar concentrations of cyanide in water ...
Massimiliano, Tomasulo +1 more
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Computational Insights on the Isomerization of Photochromic Oxazines
The Journal of Physical Chemistry A, 2012We investigated the isomerization of the simplest member of a family of photochromic oxazines with the aid of density functional theory, using three different functionals. Specifically, we simulated the thermal interconversion of the two enantiomers, associated with this compound, and established that the opening of the oxazine ring dictates the rate ...
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Synthesis of substituted tetrahydro-1,3-oxazines
Chemistry of Heterocyclic Compounds, 1973A number of mono-, di-, tri-, and tetrasubstituted tetrahydro-1,3-oxazines were synthesized by the reaction of 3-amino- and 3-methylamino-1-propanols with aldehydes. © 1975 Consultants Bureau.
Boiko I. +5 more
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ChemInform Abstract: Di(oxazine) Pigments.
ChemInform, 1989AbstractCoupling of 2 equivalents of the 2‐methoxyanilines (I) with chloranil (II) forms the intermediates (III) which are cyclized under more severe conditions to give the di(oxazines) (IV).
D. Chesca, I. Sebe, G. Boruzi
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ChemInform Abstract: NOVEL OXAZINE SYNTHESIS
Chemischer Informationsdienst, 1980AbstractDie o‐Chlorbenzoesäure (I) cyclisiert in der Schmelze, nach 12stündigem Stehen oder in Lösungsmitteln wie z.B. in siedendem Benzol, mit N‐Cyan‐pyrrolidin (II) zum Oxazin (III).
Gerhard Oremek +3 more
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Synthesis of Chiral Helical 1,3-Oxazines
Organic Letters, 2012A 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.
Ashutosh V. Bedekar +2 more
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1991
This chapter deals with the reviews published in the past decade dealing with 1, 3-oxazines. It includes a survey by Steglich on the uses of 1, 3-oxazin-6-ones, as versatile intermediates in heterocyclic synthesis. A more general summary of the chemistry and uses of “oxazinones” covering the period 1976-1985 are presented by Zakhs and coworkers.
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This chapter deals with the reviews published in the past decade dealing with 1, 3-oxazines. It includes a survey by Steglich on the uses of 1, 3-oxazin-6-ones, as versatile intermediates in heterocyclic synthesis. A more general summary of the chemistry and uses of “oxazinones” covering the period 1976-1985 are presented by Zakhs and coworkers.
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1,2-Oxazines and Their N-Oxides in Synthesis
HETEROCYCLES, 2002AbstractFor Abstract see ChemInform Abstract in Full Text.
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Towards the Asymmetric Synthesis of 1,2-Oxazines
2019The present work dealt with the preparation of some key intermediates and their use for the generation of chemical diversity. In Chapter 2 the synthesis of cycloadducts 2.24 was attempted starting fiom acyl nitroso species 2.2. In Chapter 3 a novel route to alkene-functionalised monobactams was developed and their potential in diversity oriented ...
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