Interaction of 1, 3-dioxa-2-silacyclanes and their oligomers with alklymagnesium and arylmagnesium halides

Conclusions Cyclic alkoxysilanes — 1,3-dioxa-2-silacyclanes — and their oligomers are decomposed by organomagnesium compounds with the formation of the corresponding silanols (disiloxanes) and tetraalkylsilanols.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1283–1285, July, 1966.     

Photochemical chlorination of 2-trichloromethyl-1,3-dioxolane

The photochemical chlorination of 2-trichloromethyl-1,3-dioxolane proceeds only at the carbon atoms in the 4 and 5 positions. The structures of the resulting 2-trichloromethyl-4-chloro-and 2-trichloromethyl-4,5-dichloro-1,3-dioxolanes were proved by means of the IR spectra and chemical transformations.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1611–1613, December, 1973.     

Trialkyl-n-(2-vinyloxyethyl)ammonium salts — New systems akin to acetylcholine

Conclusions Vinyloxyethyltrialkylammonium salts possessing strong hypertensive activity were prepared by reacting 2-(dialkylamino)ethyl vinyl ethers with alkyl iodides and 2-halogenoethyl vinyl ethers with tertiary amines.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1178–1180, May, 1969.     

The Mechanism of Isomerization Recyclization of Diacetyl Derivatives of Pyridinium Salts

A mechanism has been considered for the recyclization of pyridinium salts using their diacetyl derivatives as an example. The enthalpies of formation of the intermediates were estimated by the molecular mechanics method (MMX88). The nature of the rate-determining step of the reaction is discussed.