Bronsted acidic ionic liquids and their zwitterions: Synthesis, characterization and pK(a) determination
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The appropriate b-hetero-substituted alkyl and alkenyl iodide in 2:2:1:1 methylal-tetrahydrofuran-Et2O-pentane at -130 Deg with BuLi yielded by iodine-Li exchange the corresponding Li derivs. which were characterized by carboxylation and subsequent esterif ...
The Garcia-Gonzalez reaction Of D-glucose and ethyl acetoacetate generated ethyl 5-[(1'S)-D-erythrosyl]-2-methyl-3-furoate (5), which was converted to ethyl 5-[(1'R)-1',4'-dideoxy-1',4'-imino-D-erythrosyl]-2-methyl-3-furoate (3c) and to ethyl 5-[(1'S)-1',4 ...
Novel three-component domino processes to polyheterocycles are developed. Reaction of an allylamine, an aldehyde and an alpha -isocyanoacetamide in methanol at room temp. provides an efficient access to an oxa-bridged tricycle as a single diastereoisomer. ...
A series of 'dual-functionalised' ionic liquids, comprising imidazolium cations with various functionalities and the nitrile functionalised anion CH3H(BF3)CH2CN have been prepared; some exhibit very low viscosities-a highly valuable property in many a ...
Although there are many conceivable ways to functionalize, and specifically carboxylate, 2-chloro-4-(trifluoromethyl)pyridine optionally at all three vacant positions, it is more straightforward to prep. only 2-chloro-4-(trifluoromethyl)pyridine-3-carboxyl ...
Thin boron-doped diamond films were prepd. by HF CVD (hot filament chem. vapor deposition technique) on conductive p-Si substrate (Si/diamond). The morphol. of these Si/diamond electrodes was investigated by SEM and Raman spectroscopy. The electrochem. beh ...
The title compound, C6H12N4. C9H16O4, undergoes several thermotropic phase transitions. The crystalline structure is layered, with sheets of azelaic acid linked to sheets of hexamethylenetetramine by hydrogen bonds. In the room-temperature phase, the azela ...
Poly(dimethylsiloxane) copolymers containing a small fraction of carboxylic acid or Zn-carboxylate groups were prepared and compared regarding reversible gelation by hydrogen-bonding and ion-pair interaction. The polymers were synthesized by condensation o ...
A series of imidazolium salts with the nitrile functional group attached to the alkyl side chain, viz. [C(n)CNmim][X] (where C(n)CNmim is the 1-alkylnitrile-3-methylimidazolium cation and C-n = (CH2)(n), n = 1-4; X = Cl, PF6, and BF4) and [C(3)CNdmim][X] ( ...
