59025-32-0Relevant articles and documents
Azoles and azines. XCIX. some reactions of oxo derivatives of 5,5′-ylidenedipyrimidines and 5H-pyrano[2,3-d:6,5-d′]dipyrimidines
Moskvin,Petrova,Krasnov,Ivin
, p. 803 - 810 (2007/10/03)
5,5′-Alkylidene(arylmethylene)dipirimidin-4,4′,6,6′- tetraols and 5-alkyl(aryl)-5H-pyrano-[2,3-d:6,5-d′]dipyrimidine-4,6(3H,7H)-diones react with POCl3, yielding mainly 4,6-dichloro-5H-pyrano-[2,3-d:6,5-d′]dipyrimidines. The chlorine atoms in the latter compounds are readily replaced by the action of nucleophiles, such as sodium methoxide and benzylamine. Hydrogen sulfite ion adds at C2 of 5,5′-alkylidene-(arylmethylene)dipyrimidine-4,4′,6,6′- tetraols. Barbituric acid also attacks position 2 of the pyrimidine ring, resulting in decomposition of the substrate to give 5-aminomethylenebarbituric acid or its derivatives. Alkylation of 5-alkyl(aryl)-5H-pyrano[2,3-d:6,5-d′]dipyrimidine-4,6(3H,7H)-diones with dimethyl sulfate and methyl iodide occurs at the nitrogen atoms, whereas diazomethane reacts at both nitrogen and oxygen atoms.
SYNTHESIS OF 2,2-BIS(ARYLSULFONYL)VINYLAMINES, THEIR ANALOGS, AND SYMMETRICAL TRIMETHINECYANINES BY MEANS OF BIS(TRIMETHYLSILYL)FORMAMIDE
Lazukina, L. A.,Mushkalo, I. L.,Neplyuev, V. M.,Kukhar', V. P.
, p. 2114 - 2117 (2007/10/02)
The reactions of compounds containing active methylene and methyl groups (β-disulfones, arylsulfonylacetonitriles, barbituric acid, rhodanines, methylsubstituted quaternary salts of nitrogen heterocycles) with bis(trimethylsilyl)formamide were investigate
