AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Reactions of fullerene C60 with fluorene-2-carbaldehyde or 2,7-diacetylfluorene in toluene gave novel spiromethanofullerenes containing a reactive free formyl group. A novel fluorene-containing fullerenopyrrolidine was obtained by the Prato reaction. The purity and compositions of the compounds obtained were confirmed by MALDI TOF mass spectrometry and HPLC. Their structures were confirmed by 2D homo-and heterocorrelation NMR techniques.

The reactions of fullerene C60 with thiophosphorylated mono-or dialdehydes and N-methylglycine in toluene afforded new thiophosphorylated fullerenopyrrolidines, including those containing the free aldehyde group. The purity and compositions of the reaction products were confirmed by MALDI-TOF mass spectrometry and HPLC. The structures of the reaction products were established by two-dimensional homo-and heterocorrelation NMR experi-ments. The properties of the products were studied by cyclic voltammetry and quantum chemical methods. The Pishchimuka rearrangement in thiophosphorylated derivatives of fullerenopyrrolidines was performed for the first time, and thiol esters of phosphonic acids of fullerenopyrrolidines were prepared.

The combined electrochemical reduction of fullerene C60 in the presence of p-bromo-benzoyldibromomethane or bis(diisopropoxyphosphoryl)dibromomethane at a brass electrode in a mixed solvent o-dichlorobenzene-MeCN (3:1 v/v)/0.05 M Bu4NBF4 at room temperature affords 61-(p-bromobenzoyl)methano[60]fullerene or 61,61-bis(diisopropoxyphosphoryl)methano[60]fullerene, respectively, in ∼50% yields.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

N-Aryl-substituted 5-oxo-tetrahydroimidazo[1,5-a]imidazoles, tetrahydroimidazo[1,2-c][1,3,2 lambda(3)]- and -[1,2-c][1,3,2 lambda(5)]diazaphospholes, as well as 6-ore- and 5,6-dioxohexahydroimidazo[1, 2-a]pyrazines were synthesized using 2-arylaminomethylimidazolines as 1,4-binucleophiles.

The effect of polyethylene glycol-600 monolaurate (PEG-ML) reversed micelles on the reaction of 2-alkylaminomethylphenols (AMP) with 4-nitrophenyl-bis(chloromethyl) phosphinate in toluene has been investigated. PEG-ML increases the observed rate constant of the reaction by more than one order of magnitude. AMP concentration in solution affects the position of the maximum on the concentration dependence of the micellar-catalyzed-reaction rate constants. The reaction rate constant in the micellar phase and the binding constant of the substrate with micelles depend on the alkyl chain length and AMP concentration. Inhibition of the reaction studied is observed in the presence of high PEG-ML concentrations and low AMP concentrations.

The effect of cetylpyridinium bromide (CPB) and sodium dodecyl sulphate (SDS) on the direction and the rate of the reaction ofo-dimethylaminomethylphenol (MP) withp-nitrophenyl diphenyl phosphate (1) has been studied by31P NMR and spectrophotometry. It was shown that the reaction of MP with1 proceeds in two steps both with and without the surfactant. The product of transesterification is formed in the first step. The second step is hydrolysis catalyzed by the aminomethyl group yielding equal amounts of diphenyl phosphate ando-dimethylaminomethyl phenyl phosphate. The reaction of MP with1 is catalyzed by CPB and inhibited by SDS. The ratio between the rates of the first and the second stages changes in the presence of surfactant. The parameters of the reaction of MP with1 inhibited by micellar SDS were calculated.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Cyclization of thiosemicarbazide with methyl 3-chloro-2-oxo-3-phenylpropionate in MeCN results in 5-hydroxy-2-imino-5-methoxycarbonyl-6-phenylperhydro-1,3,4-thiadiazine. The structure of the product has been confirmed using spectral (IR,1H,13C,13C{1H} NMR) methods and chemical transformations.

The mechanism of nucleophilic substitution in O,O-dimethyl-O-(4-nitrophenyl)-thiophosphate (DNTP) has been studied in alkaline micellar solutions of cationic 2-hydroxyethyl surfactant which displays nucleophilic properties on account of dissociation of the 2-hydroxyethyl group. Further transformation of the intermediate product formed can take place by regeneration of the initial nucleophilic form of the surfactant, or by formation of a new zwitterion form of phosphorylated surfactant.

The31P-(1H) NMR spectra of bis(alkylalkoxythiophosphoryloxy)phosphonites may be utilized to determine the enantiomeric purity (p) of O-alkylalkylthiophosphonic acids with the application of the Oro equation, p= √(Q − Q′)/(Q + Q′), where Q is the integral intensity of the d, ℓ-form, and Q′ is the integral intensity of the meso forms.

The free-radical nature of the reactions of a series of dithiophosphate complexes of zinc with peroxides was established by31P chemically induced dynamic nuclear polarization (CIDNP). The polarization coefficient, the reaction rate constant, and the nuclear relaxation rate were determined. The dependence of the polarization coefficient on the intensity of the external magnetic field was established.