Reaction of chemically generated carbon-14 atoms with cyclopropane

Species and equilibriums in the methylmercury(II)-imidazole system

“…Studies on the binding of CHaHg11 by histidyl residues of peptides and proteins are in progress. (7) . T. Falrhurst and D. L. Rabenstein, Inorg.…”

Synthesis of Methylene- and Alkylidenecyclopropane Derivatives

“…457 gem-Difluoro-disubstituted MCPs 383 were obtained in good yield by selenoxide elimination from the corresponding cyclopropanes 382 (Scheme 155). 458 Interestingly, the same reaction failed when performed on the related cyclopropanes lacking the fluoro substituents, while it has success with the 155). 458 Danheiser has conceived a novel elimination route to ACPs by thermolysis of R-spirocyclopropyl β-lactones.…”

“…Ring contraction to give MCPs by thermal or photochemical means is a typical reaction of cyclobutylidenes. , These very reactive species can be generated by thermal decomposition of cyclobutanone tosylhydrazones 112 at temperatures generally above 150 °C; ring contraction then occurs to give MCP 3 as the major product together with cyclobutene 114 (Scheme ).

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Carbon, Silicon, Germanium, Tin, and Lead (Group IVA)

“…Alcohols react with C 3 to give 1,1-dialkoxypropynes as products, apparently by two Ο-Η insertion reactions. 63 Shevlin and his co-workers [78][79][80][81][82][83][84] have devised clever means of generating carbon atoms from simple thermal decomposition of chemical reagents. The compounds shown below have both been employed, the 5-tetrazoyldiazonium chloride being the most useful.…”

“…Also, it is possible that the chemically generated atoms react by lower energy stepwise processes. The following reactions are referenced as: epoxides, 78 ' 82 cyclopropane, 80 CO, 81 Silicon and germanium atoms also undergo oxidative addition reactions. However, very reactive substrates must be employed since these atoms are not nearly as reactive as carbon atoms in a low-temperature matrix.…”