Relevant bibliographies by topics / Β-trifluoroacetoxy

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  1. Journal articles
  2. Dissertations / Theses

Academic literature on the topic 'Β-trifluoroacetoxy'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Β-trifluoroacetoxy"

1

Kumar, Rajesh, Nitya Sharma, and Om Prakash. "Hypervalent Iodine Reagents in the Synthesis of Flavonoids and Related Compounds." Current Organic Chemistry 24, no. 18 (November 18, 2020): 2031–47. http://dx.doi.org/10.2174/1385272824999200420074551.

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Hypervalent iodine compounds have proved to be very useful reagents to bring about various oxidative transformations including (i) α-functionalization of carbonyl compounds, (ii) oxidation of phenols, and (iii) oxidative rearrangement of ketones and α,β- unsaturated ketones. These reactions find interesting applications in the development of newer and convenient approaches for the synthesis of flavonoids. This review focuses on the use of most common three hypervalent compounds, namely iodobenzene diacetate, [hydroxy(tosyloxy)iodo]benzene, and [bis-trifluoroacetoxy(iodo)]benzene in the synthesis of cis/trans-3-hydroxyflavanones, 3-hydroxyflavones (flavonols), flavones, isoflavones and related compounds.
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2

Papadopoulou, Despina, Ioannis Papoutsis, Spyros Spyroudis, and Anastasios Varvoglis. "Cyclisation of tryptamine enaminones to functionalised tetrahydro-β-carbolines induced by [bis(trifluoroacetoxy)iodo] benzene." Tetrahedron Letters 39, no. 18 (April 1998): 2865–66. http://dx.doi.org/10.1016/s0040-4039(98)00319-0.

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3

Cufos, Thierry, Philippe Diaz, and Lucien Stella. "Synthesis of Bridged Bicyclic β-Trifluoroacetoxy β-Trifluoromethyl α-Amino Acid Derivatives by an Original Dakin-West/Diels-Alder Tandem Sequence." Synlett 1995, no. 01 (January 1995): 101–2. http://dx.doi.org/10.1055/s-1995-4844.

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4

CUFOS, T., P. DIAZ, and L. STELLA. "ChemInform Abstract: Synthesis of Bridged Bicyclic β-Trifluoroacetoxy β- Trifluoromethyl α-Amino Acid Derivatives by an Original Dakin- West/Diels-Alder Tandem Sequence." ChemInform 26, no. 33 (August 17, 2010): no. http://dx.doi.org/10.1002/chin.199533144.

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5

Skonieczny, Kamil, Jarosław Jaźwiński, and Daniel Gryko. "The Synthesis of Imidazo[1,2-f]phenanthridines, Phenanthro-[9,10-d]imidazoles, and Phenanthro[9′,10′:4,5]imidazo[1,2-f]-phenanthridines via Intramolecular Oxidative Aromatic Coupling." Synthesis 49, no. 20 (June 26, 2017): 4651–62. http://dx.doi.org/10.1055/s-0036-1589053.

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A short and efficient access to phenanthro[9,10-d]imidazoles, imidazo[1,2-f]phenanthridines, and phenanthro[9′,10′:4,5]imidazo[1,2-f]phenanthridines was achieved by the action of [bis(trifluoroacetoxy)iodo]benzene (PIFA) on properly substituted tetraaryl­-imidazoles. By pre-installing suitable electron-donating groups, it is possible to control the site of intramolecular oxidative aromatic coupling. In particular, by placing 3,4-dimethoxyphenyl and 3-methoxyphenyl moieties in close proximity, it was possible to direct the reaction into forming two biaryl linkages leading eventually to the formation of phenanthro[9′,10′:4,5]imidazo[1,2-f]phenanthridines. Starting from bis-aldehydes that are derivatives of thieno[3,2-b]thiophene and fluorene enabled the synthesis of π-expanded imidazoles bearing 8-9 conjugated rings. By placing a dimethoxynaphthalene unit on the imidazole scaffold, we have directed the oxidative coupling reaction towards closing a five-membered ring with concomitant removal of methoxy group leading to formation of an α,β-unsaturated ketone. All resulting π-expanded imidazoles display blue emission, and the fluorescence quantum yields in some cases reaches 0.9.
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Dissertations / Theses on the topic "Β-trifluoroacetoxy"

1

Harman, David Grant. "Mechanisms of the Intriguing Rearrangements of Activated Organic Species." Phd thesis, 2003. http://hdl.handle.net/1885/47123.

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The β-acyloxyalkyl radical rearrangement has been known since 1967 but its mechanism is still not fully understood, despite considerable investigation. Since the migration of a β-trifluoroacetoxy group generally proceeds more rapidly and with more varied regiochemistry than its less electronegative counterparts, this reaction was studied in the hope of understanding more about the subtleties of the mechanism of the β- acyloxyalkyl radical rearrangement. The mechanism of the catalysed rearrangement of Nalkoxy- 2(1H)-pyridinethiones was also explored because preliminary studies indicated that the transition state (TS) for this process was isoelectronic with TSs postulated for the β-acyloxyalkyl radical and other novel rearrangements. ¶ ...
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