Fluorine-Substituted Tetraphenylethene Systems

Hussain, Zahid; Hopf, H.; Oeser, Thomas

doi:10.2174/1570178054640886

Cited by 3 publications

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“…4,4'-Dimethoxybenzophenone was purchased from Aldrich. 3,3',5,5'-Tetramethoxybenzophenone [20] and tetra(4-hydroxyphenyl)ethene 3 [21] were prepared by the reported procedures. Concanavalin A (Con A), mannan, peanut agglutinin (PNA), bovine serum albumin (BSA), bandeiraea simplicifolia (BS-I), thyroglobulin (Tg), and wheat germ agglutinin (WGA) were purchased from Sigma-Aldrich.…”

Section: Methodsmentioning

confidence: 99%

Fluorescence Turn‐On Sensing of Lectins with Mannose‐Substituted Tetraphenylethenes Based on Aggregation‐Induced Emission

Sanji

Shiraishi

Nakamura

et al. 2010

Chemistry An Asian Journal

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The synthesis of mannose-substituted tetraphenylethenes (TPEs) and their aggregation-induced emission (AIE) behavior, induced by interactions with concanavalin A (Con A), are reported. A mixture of the mannose-TPE conjugates and Con A in a buffer solution displays an intense blue emission on agglutination within a few seconds, which serves as a "turn-on" fluorescent sensor for lectins. The sensing is also selective: the conjugates act as a sensor for Con A, but do not sense a galactose-binding lectin, PNA. Con A-recognition is not affected even in the presence of other proteins in a mixture. The conjugates also exhibit high sensitivity to detect Con A. An increased sensitivity of the conjugates results if mannopyranoside substituents are linked to the TPE-core unit with a flexible chain and/or when the number of mannose residues increases.

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Section: Methodsmentioning

confidence: 99%

Fluorescence Turn‐On Sensing of Lectins with Mannose‐Substituted Tetraphenylethenes Based on Aggregation‐Induced Emission

Sanji

Shiraishi

Nakamura

et al. 2010

Chemistry An Asian Journal

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The McMurry Coupling and Related Reactions

Takeda

Tsubouchi

2013

Organic Reactions

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The McMurry coupling reaction has been recognized as one of the most efficient methods for the synthesis of alkenes from carbonyl compounds. This reaction can be applied to the preparation of various alkenes that are otherwise difficult to prepare. For example, sterically congested tetrasubstituted alkenes as well as medium to large membered rings involving natural products may be accessed via this process. This coupling utilizes various low‐valent titanium reagents generated by the reduction of titanium (III or IV) chloride with K, Zn, LiAlH 4 , C 8 K, amongst others. Furthermore, a variety of low‐valent metal species other than titanium, including aluminum, zirconium, niobium, molybdenum, indium, tungsten, and samarium, have also been found to promote the reductive coupling of carbonyl compounds. The scope and limitations of these reagent systems are reviewed in this chapter, together with the stereochemistry and reaction mechanism. This reaction is categorized into four coupling modes: i) homocoupling giving symmetrical alkenes, ii) mixed coupling giving unsymmetrical alkenes, iii) intramolecular coupling giving cycloalkenes, and iv) tandem coupling giving cyclic polyenes. Characteristics of these reaction modes are described briefly. A selection of synthetic applications are reviewed, including examples of the preparation of sterically congested and strained alkenes, medium to large‐ring compounds, biologically active targets, as well as substrates applicable in material science. Experimental conditions used for this versatile process are summarized to assist the choice of suitable conditions.

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Tetraphenylethene–triphenylene oligomers with an aggregation-induced emission effect and discotic columnar mesophase

Chen

et al. 2013

RSC Adv.

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Fluorine-Substituted Tetraphenylethene Systems

Cited by 3 publications

References 0 publications

Fluorescence Turn‐On Sensing of Lectins with Mannose‐Substituted Tetraphenylethenes Based on Aggregation‐Induced Emission

Fluorescence Turn‐On Sensing of Lectins with Mannose‐Substituted Tetraphenylethenes Based on Aggregation‐Induced Emission

The McMurry Coupling and Related Reactions

Tetraphenylethene–triphenylene oligomers with an aggregation-induced emission effect and discotic columnar mesophase

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