Facile Synthesis of an Unsaturated Spiro Germane by Hydroalumination and Intramolecular 1,1-Carbalumination
摘要:
Treatment of the tetraethynylgermanium compound Ge(C CC6H5)(4) 4 with 2 equiv of H-Al-[CH(SiMe3)(2)](2) yielded the addition product Ge(C CC6H5)(2)[C{AIR(2)}=C(H)C6H5](2) (5, R = CH-(SiMe3)(2)) by reduction of two of its C C triple bonds. Heating of 5 to 260 degrees C for 10 min gave a unique rearrangement reaction which via intramolecular 1,1-carbalumination afforded the spiro germane 6 (a 3,7-bis[1-phenylmeth-(Z)-ylidene]-4-germaspiro[3,3]hepta-1,5-diene derivative), The molecular structure of 6 comprises two unsaturated 1-germacyclobut-2-ene heterocycles with a joint germanium atom and two exocyclic C=C double bonds.
作者:A. A. Andreev、V. V. Konshin、N. A. Vinokurov、N. V. Komarov
DOI:10.1007/s11172-006-0434-5
日期:2006.8
A straightforward synthesis of tetra-and trialkynylgermanes by reactions of compounds containing Ge-N or Ge-Cl bonds with alk-1-ynes was proposed. Reactions of appropriate amino-or halogermanes with alk-1-ynes were effective only in the presence of an equivalent amount of zinc dihalide.
Treatment of the tetraethynylgermanium compound Ge(C CC6H5)(4) 4 with 2 equiv of H-Al-[CH(SiMe3)(2)](2) yielded the addition product Ge(C CC6H5)(2)[CAIR(2)}=C(H)C6H5](2) (5, R = CH-(SiMe3)(2)) by reduction of two of its C C triple bonds. Heating of 5 to 260 degrees C for 10 min gave a unique rearrangement reaction which via intramolecular 1,1-carbalumination afforded the spiro germane 6 (a 3,7-bis[1-phenylmeth-(Z)-ylidene]-4-germaspiro[3,3]hepta-1,5-diene derivative), The molecular structure of 6 comprises two unsaturated 1-germacyclobut-2-ene heterocycles with a joint germanium atom and two exocyclic C=C double bonds.