Fluorine-containing heterocumulenes. 19. Synthesis and reactions of 2-perfluoro-tert-butyl-3,3-diphenyloxaziridine

Conclusions A method is proposed for the production of N-perfluoro-tert-butyldiphenyloxaziridine. Its cycloaddition to electrophilic and nucleophilic dipolarophiles, leading to the synthesis of fluorine-containing oxadiazolidinones, dioxazolidine, and a uniquely stable aziridinone, was investigated.For Communication 18, see [1].Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1788–1791, August, 1979.The authors thank P. V. Petrovskii and A. I. Lutsenko for recording and interpreting the¹³C NMR spectrum.     

Calculation of the molecule of coronene-10,5 (C30H10)

Conclusions Coronene-10,5 possesses a closed -electron shell.The regular coronenes-n,m satisfy the equation m=4n/(n-2), where n is the number of vertices of the framed polygon and m that of the framing polygon. It is easy to verify that only four regular coronenes are possible, namely,coronenes–3,12, –4,8, –6,6, and –10,5.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 435–437, February, 1970.     

New method of preparing β-lactams

Summary A method has been devised for the synthesis of B-lactams from amides of -halocarboxylic acids, Some new azetidinones with residues containing carboxyl groups on the nitrogen have been prepared. The method permits the conversion of -amino acids into difficulty accessible mixed (secondary) amino acids.