α-Ferrocenylalkylation of Some Biologically Active Compounds

Russian Journal of Organic Chemistry -     

Action of phosphorus pentasulfide on 5-acetamidothiohydantoins and 4-bromo-5-acetamidopyrazoles

New condensed systems — (5,4-thiazolo)imidazoline-2-thione and pyrazolo[5,4-d]thiazoles -are formed by reaction of phosphorus pentasulfide with 5-acetamidothiohydantoins and 4-bromo-5-acetamido derivatives of pyrazole.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 932–934, July, 1974.     

Telomerization of propylene with methyl dichloroacetate

Conclusions The telomerization of propylene with methyl dichloroacetate includes chain transfer via the C-H and C-Cl bonds, and leads to the formation of four series of telomers, the methyl esters of chloro-substituted acids of type X[CH(CH₃)CH₂]_nCClYCO₂CH₃ (X, Y=H, Cl), and also of the telomeric esters of the higher alcohols and dichloroacetic acid.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2150–2152, September, 1977.     

Singularities of the second derivatives of tunnel current

It is shown, that though paramagnetic impurities wash out the density of electronic states at the gap edge, the singularities of the second derivatives in the model of Abricosov-Gor'kov are not eliminated.     

Pyrazoles

The IR, UV, and NMR spectra of 3- and 5-pyrines, and of their thio, seleno, and imino analogs, are examined, and their pK_a values measured. On the basis of the results, it is suggested that protonation in these systems takes place at the exocyclic heteroatom.For part LXIII, see [8].     

Demjanov reaction with 1-methyl-2-aminomethylpiperidine

The Demjanov rearrangement with ring expansion proceeds to a slight degree (9%) during the deamination of 1-methyl-2-aminomethylpiperidine with nitrous acid, and the major reaction products are 1-methyl-2-hydroxymethylpiperidine and 6-methylamino-2-hexanone.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1654–1658, December, 1970.