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Paper | Special issue | Vol 52, No. 3, 2000, pp.1171-1189
Published online, 1st January, 1970
DOI: 10.3987/COM-99-S115
Preparation of Sn-, Ge-, and Si-Heterocycles from Zirconacycles

Yasuyuki Ura, Yanzhong Li, Fu-Yu Tsai, Kiyohiko Nakajima, Martin Kotora, and Tamotsu Takahashi*

*Catalysis Research Center and Graduate School of Pharmaceutical Sciences, Hokkaido University, and CREST, Science and Technology Corporation (JST), Sapporo 060-0811, Japan


Stannacycles such as stannacyclopentanes, stannacyclopentenes and stanacyclopentadienes were prepared from the corresponding zirconacycles. The effect of addition of CuCl on the reaction of zirconacycles with tin halides is remarkable. In the case of germanium and silicon halides, the remarkable effect of CuCl addition was not observed. Symmetrical or unsymmetrical germa- and silacycles were prepared by the reaction of silicon or germanium halides with dilithio compounds prepared from the corresponding zirconacycles. Several heterocyclic compounds containing two metalloatoms were also prepared.