J. Ohshita, H. Ohnishi, Akinobu Naka
Jun 27, 2006
Citations
0
Influential Citations
8
Citations
Journal
Organometallics
Abstract
The thermolysis of 1,2-di(adamantoyl)tetrakis(trimethylsilyl)disilane (1a) with diphenylacetylene at 140 °C for 24 h afforded 1-[(E)-1,2-diadamantyl-2-(trimethylsiloxy)ethenyloxy]-2,3-diphenyl-1-[tris(trimethylsilyl)silyl]-1-silacycloprop-2-ene (2a) and 3,4-diadamantyl-2,2-bis(trimethylsiloxy)-1,1-bis(trimethylsilyl)-1,2-disilacyclobut-3-ene (3a) in 43% and 41% yields, respectively. Similarly, the cothermolysis of 1,2-di(pivaloyl)tetrakis(trimethylsilyl)disilane (1b) with diphenylacetylene gave 1-[(E)-1,2-di(tert-butyl)-2-(trimethylsiloxy)ethenyloxy]-2,3-diphenyl-1-[tris(trimethylsilyl)silyl]-1-silacycloprop-2-ene (2b) in 52% yield, along with a mixture of unidentified products. The reaction of 1a with bis(trimethylsilyl)acetylene under the same conditions produced 1-[(E)-1,2-diadamantyl-2-(trimethylsiloxy)ethenyloxy]-2,3-bis(trimethylsilyl)-1-[tris(trimethylsilyl)silyl]-1-silacycloprop-2-ene and 3a in 54% and 23% yield, while 1b with bis(trimethylsilyl)acetylene gave 1-[(E)-1,2-di(tert-butyl)-2-(trimethy...