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Article
Water Mediated Crystallization and Polymorphism of Zinc Phthalocyanine
The crystallization of zinc phthalocyanine (ZnPc) by slow diffusion of water into the solution in 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone (DMPU) resulted in a formation of a series of crystals. The fir...
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Article
Chiral 2-Oxo-1,4,2-oxazaphosphorinanes: Synthesis, Structure, and Applications (A Review)
The review summarizes the literature data on methods for the preparation of both racemic and enantiopure 2-oxo-1,4,2-oxazaphosphorinanes – phosphorus-containing heterocyclic compounds, which are N-substituted der...
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Article
Synthesis of Chiral 1,4,2-Oxazaphosphorinanes Bearing Pyridyl Substituents
A series of 1,4,2-oxazaphosphorinanes was synthesized by the three-component reaction of chiral pyridylcontaining imines with trialkyl phosphites and monochloroacetic acid, followed by dealkylation of the P(O)...
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Article
Chiral recognition of N-thiophosphorylated thioureas via nickel(ii) coordination assisted by 4-dimethylaminopyridine
Nickel(ii) complexes were synthesized using chiral N-thiophosphorylated thioureas as the starting compounds and 4-dimethylaminopyridine as a co-ligand. The reaction with racemic thiourea afforded homochiral compl...
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Article
New chiral 1,4,2-oxazaphosphorinanes bearing a free hydroxy group
New chiral 3-aryl-2-hydroxy-2-oxo-5-R-1,4,2-oxazaphosphorinanes were obtained by a three-step one-pot synthesis, which included the preparation of imines from enantiopure (2R)-2-aminoalkan-1-ols, their phosphonyl...
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Article
Condensation products of Betti base and pyridinecarboxaldehydes
Previously unknown condensation products were obtained by the reaction of the racemic Betti base with 2-, 3- and 4-pyridinecarboxaldehydes. It was established that they have a naphthoxazine structure in solid ...
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Article
Phosphorylation of Betti Base with Bis(diethylamino)phosphoryl Chloride
The reaction of bis(diethylamino)phosphoryl chloride with N-Boc-protected 1-(α-aminobenzyl)-2- naphthol (Betti base) proceeded via O-phosphorylation of the phenolic OH group to form the target product as trifluor...
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Article
Ni(II) complex of bisthiophosphorylated thiourea prepared from the Betti base
The interaction between bisthiophosphorylated thiourea with nickel(II) nitrate in the presence of potassium tert-butylate has afforded NiL2 complex with square-planar configuration of the nickel(II) ion and the 1...
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Article
Betti base in the synthesis of chiral bisphosphorylated thioureas
Phosphorylation of a naphthol hydroxy group of thiophosphorylated thiourea obtained by reaction of diethyl thiophosphoryl isothiocyanate with 1-(α-aminobenzyl)-2-naphthol (Betti base) afforded a number of chir...
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Article
First coordination polymer based on diterpenoids. Synthesis, structure, and magnetic properties
One-dimensional coordination polymer was obtained by cation exchange reaction of triethylammonium salt of methyl ent-16α-H-phosphonyloxybeyeran-19-oate with CuCl2. Its structure was determined by single crystal X...
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Article
A text steganography method based on Markov chains
A new method of text steganography based on Markov chains of different orders that allows the introduction of hidden information in texts is presented together with test results of a software solution which ge...
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Article
Phosphorylation of betti base with diethyl chlorophosphate
Phosphoric acid derivatives containing chiral Betti base fragment were synthesized by reacting racemic and enantiopure N-Boc-protected 1-(α-aminobenzyl)-2-naphthols with diethyl chlorophosphate followed by deprot...
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Article
Phosphorylation of Betti bases
Reaction of N-substituted 1-(α-aminobenzyl)-2-naphthols (Betti bases) with phosphorus(III) compounds followed by sulfurization afforded new cyclic phosphorylated and thiophosphorylated diastereomeric derivatives ...
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Article
Diastereoselective synthesis of α-aminoalkylphosphonic acid derivatives of Betti base
A reaction of triethyl phosphite with 3-alkyl-1-phenylnaphthoxazines in the presence of halotrimethylsilanes with subsequent removal of the trimethylsilyl group by hydrolysis furnished diastereomeric α-aminoal...
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Article
Metal derivatives of diterpenoid isosteviol
Metal salts (including transition metals salts) of chiral natural diterpenoid isosteviol and its hydrophosphoryl derivative were obtained for the first time. The compounds obtained can be used in pharmaceutics...
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Article
Synthesis and properties of [(4-Hydroxy-3,5-di-tert-butylphenyl)-chloromethanediphenylphosphine oxide
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Article
New hydrophosphoryl compounds derived from ent-16-oxobeyeran-19-oic acid
A number of 16-hydroxy derivatives were obtained from ent-16-oxobeyeran-19-oic acid, O-phosphorylation of which with subsequent hydrolysis led to the corresponding hydrophosphoryl compounds. Their diastereomeric ...
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Article
Isosteviol acylphosphonates
A reaction of ent-16-oxobeyeran-19-oic acid (isosteviol) with an excess of PCl3 gives the corresponding acid chloride as a sole product. The latter reacts with trialkyl phosphites and dialkyl trimethylsilyl phosp...
