scholarly journals Secondary Amine Derivatives of p-tert-Butyl Thiacalix[4]arenes: Synthesis and Molecular Recognition of Phthalic Acid

2014 ◽  
Vol 7 (4) ◽  
pp. 345-350 ◽  
Author(s):  
Roman V. Nosov ◽  
Ivan I. Stoikov
Keyword(s):  
Molecular Recognition ◽  
Secondary Amine ◽  
Phthalic Acid ◽  
Tert Butyl ◽  
Derivatives Of

scholarly journals Synthesis and applications of secondary amine derivatives of (+)-dehydroabietylamine in chiral molecular recognition

2015 ◽  
Vol 13 (42) ◽  
pp. 10548-10555 ◽  
Author(s):  
Tiina Laaksonen ◽  
Sami Heikkinen ◽  
Kristiina Wähälä
Keyword(s):  
Molecular Recognition ◽  
Carboxylic Acids ◽  
Secondary Amine ◽  
The Novel ◽  
Resolution Of Enantiomers ◽  
Chiral Molecular Recognition ◽  
Derivatives Of ◽  
Mosher’S Acid

(+)-Dehydroabietylamine (1a), the novel derivatives (2a–6a) and their NTf2 salts (1b–6b) were tested as chiral NMR solvating agents for the resolution of enantiomers of Mosher's acid and other carboxylic acids, and their n-Bu4N salts.

Synthesis of N4-Substituted Derivatives of 1-[2-(Phosphonomethoxy)ethyl]cytosine and Its Diisopropyl Ester as a Model Reaction for the Synthesis of N4-Substituted Derivatives of Cidofovir

2005 ◽  
Vol 70 (12) ◽  
pp. 2066-2074 ◽  
Author(s):  
Šárka Chalupová ◽  
Antonín Holý ◽  
Milena Masojídková
Keyword(s):  
Secondary Amine ◽  
Model Reaction ◽  
Aqueous Methanol ◽  
Derivatives Of ◽  
Amine Salts

We have studied the reaction of 1-[2-(phosphonomethoxy)ethyl]cytosine (1) and its diisopropyl ester (2) with triethylammonium hydrogensulfite in 60% aqueous methanol. In the presence of some primary or secondary amine salts, at 25-70 °C, this reaction affords transaminated derivatives 4a-4e and 5a, 5b as main products accompanied by uracil compounds. However, with certain amines the reaction failed.

Anion complexation by amido derivatives of p-tert-butyl calix[4]arene

2007 ◽  
Vol 60 (1-2) ◽  
pp. 193-196 ◽  
Author(s):  
Abdelwaheb Hamdi ◽  
Rym Abidi ◽  
Jacques Vicens
Keyword(s):  
Tert Butyl ◽  
Anion Complexation ◽  
Derivatives Of

Synthesis of phosphorus derivatives of 2,6-Di-tert-butyl-4-methylphenol

2006 ◽  
Vol 76 (11) ◽  
pp. 1753-1756 ◽  
Author(s):  
A. A. Prishchenko ◽  
M. V. Livantsov ◽  
O. P. Novikova ◽  
L. I. Livantsova ◽  
D. B. Shpakovskii ◽  
...  
Keyword(s):  
Tert Butyl ◽  
Derivatives Of

Thermochemical properties of tert-butyl and cumyl derivatives of peroxide compounds

2013 ◽  
Vol 87 (8) ◽  
pp. 1253-1258
Author(s):  
Yu. P. Pavlovskii ◽  
N. S. Kachurina ◽  
S. I. Gerasimchuk ◽  
Yu. Ya. Van-Chin-Syan
Keyword(s):  
Thermochemical Properties ◽  
Tert Butyl ◽  
Derivatives Of

scholarly journals Molecular recognition of surface-immobilized carbohydrates by a synthetic lectin

2014 ◽  
Vol 10 ◽  
pp. 1354-1364 ◽  
Author(s):  
Melanie Rauschenberg ◽  
Eva-Corrina Fritz ◽  
Christian Schulz ◽  
Tobias Kaufmann ◽  
Bart Jan Ravoo
Keyword(s):  
Molecular Recognition ◽  
Self Assembled Monolayers ◽  
Carbohydrate Binding ◽  
Air Oxidation ◽  
Acetylneuraminic Acid ◽  
Physiological Processes ◽  
Wide Range ◽  
Assembled Monolayers ◽  
Synthetic Carbohydrate ◽  
Derivatives Of

The molecular recognition of carbohydrates and proteins mediates a wide range of physiological processes and the development of synthetic carbohydrate receptors (“synthetic lectins”) constitutes a key advance in biomedical technology. In this article we report a synthetic lectin that selectively binds to carbohydrates immobilized in a molecular monolayer. Inspired by our previous work, we prepared a fluorescently labeled synthetic lectin consisting of a cyclic dimer of the tripeptide Cys-His-Cys, which forms spontaneously by air oxidation of the monomer. Amine-tethered derivatives of N-acetylneuraminic acid (NANA), β-D-galactose, β-D-glucose and α-D-mannose were microcontact printed on epoxide-terminated self-assembled monolayers. Successive prints resulted in simple microarrays of two carbohydrates. The selectivity of the synthetic lectin was investigated by incubation on the immobilized carbohydrates. Selective binding of the synthetic lectin to immobilized NANA and β-D-galactose was observed by fluorescence microscopy. The selectivity and affinity of the synthetic lectin was screened in competition experiments. In addition, the carbohydrate binding of the synthetic lectin was compared with the carbohydrate binding of the lectins concanavalin A and peanut agglutinin. It was found that the printed carbohydrates retain their characteristic selectivity towards the synthetic and natural lectins and that the recognition of synthetic and natural lectins is strictly orthogonal.

Bis(ether) derivatives of tetrakis(2-hydroxyphenyl)ethene — Direct synthesis of (E)- and (Z)-bis(2-hydroxyphenyl)-bis(2-methoxyphenyl)ethene via the McMurry olefination reaction

2006 ◽  
Vol 84 (10) ◽  
pp. 1250-1253 ◽  
Author(s):  
Mee-Kyung Chung ◽  
Paul Fancy ◽  
Jeffrey M Stryker
Keyword(s):  
Supramolecular Chemistry ◽  
Direct Synthesis ◽  
Protecting Groups ◽  
Tert Butyl ◽  
Orthogonal Protection ◽  
Protection Strategies ◽  
Titanium Trichloride ◽  
Sterically Hindered ◽  
Derivatives Of

The direct synthesis of sterically hindered, partially etherified derivatives of tetrakis(2-hydroxyphenyl)ethene is reported by using the McMurry reductive olefination reaction on a range of differentially substituted 2,2′-dialkoxy benzophenone substrates. Three orthogonal protection strategies are demonstrated, incorporating β-silylethyl, 3-butenyl, and tert-butyl protecting groups, respectively, into the starting benzophenones. The latter proved most efficient, with both the McMurry coupling and deprotection steps occurring concomitantly under the McMurry conditions to directly yield the desired bis(2-hydroxyphenyl)-bis(2-methoxyphenyl)ethene as a 1:1 mixture of E- and Z-diastereoisomers.Key words: preorganized polyaryloxide ligands, McMurry olefination, titanium trichloride, supramolecular chemistry, tetrakis(2-hydroxyphenyl)ethene, 2,2′-disubstituted benzophenone.

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