New 4-alkyl-6-amino-N3,N5-diaryl-2-thioxo-1,2,3,4-tetrahydropyridine-3,5-dicarboxamides have been prepared via enantioselective reaction of 3-amino-N-aryl-3-thioxopropanamides with N-aryl-2-cyanoacetamide and aliphatic ...

Interaction of ethyl cyanoacetate with hydrogen selenide afforded new reagent for obtaining selenium-containing heterocycles such as ethyl 3-amino-3-selenoxopropanoate. Starting from the latter substituted selenazoles ...

Reactions of N-alkyl-2-chloropyridinium salts with benzimidazolylacetonitriles result in (£)-2-(1Я-benzo[^imidazol-2-yl)-2-[1-alkylpyridin-2(1H)-ylidene]acetonitriles. The alkylation of the latter with co-bromoacetophenones ...

Multicomponent condensation of 3-aryl(hetaryl)-2,4-diacetyl-5-hydroxy-5-methylcyclohexanones with 2-cyanoethanethioamide and alkylating agents in the presence of morpholine afforded 3-(alkylsulfanyl)- 8-aryl(hetaryl)-7 ...

A three-component condensation of aromatic aldehydes, cyanothioacetamide, and benzoyl-1,1,1-trifluoroacetone, involving the acyl cleavage of the latter, results in 4-aryl-2-thioxo-6-phenyl-1,2-dihydropyridine- 3-carbonitriles. ...

Reactions of 1,3-diaryl(heteryl)prop-2-ene-1-thiones with 2-cyanoethanethio(seleno)-amides and alkyl halides led to the formation of substituted 2-alkylsulfanyl-4,6-diaryl(heteryl)-1,4-dihydropyridine-, pyridine-, and ...

Alkylation of isopropylidene- and cyclohexylidenepropanedinitrile with phenacyl bromides gave 2,2-bis(2-aryl-2-oxoethyl)propanedinitriles. Direct alkylation of propanedinitrile with phenacyl bromides afforded only ...

Fragmentary remains of sea turtles (Cheloniidae sensu lato: Argillochelys sp., Puppigerus nessovi Averianov, 2005, and Cheloniidae gen. indet.) from the Ikovo locality (Lugansk Region, Ukraine; Lower Lutetian, Middle Eocene) ...