Synthesis and Molecular Structures of Tetrasilyl Ethers of Calix[4]arenes
作者:Ulf H. Strasser、Beate Neumann、Hans-Georg Stammler、Norbert W. Mitzel
DOI:10.1002/zaac.201000007
日期:——
The tetrasilyletherscalix[4]areneOSiMe(2)R (R = Me, H, vinyl, allyl) were prepared by salt elimination; the calix[4]arene was deprotonated with sodium hydride and subsequently reacted with chlorosilanes CISiMe2R. In general, DMF was chosen as solvent in order to steer the reactions in terms of a preference for the cone-conformation of the products. In the case of calix[4]areneOSiMe(3) both, partial-cone-and