Akinobu Naka, Hiroyuki Kawasaki, Hiroki Fujimoto
Nov 15, 2011
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Influential Citations
5
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Journal
Journal of Organometallic Chemistry
Abstract
Abstract The reaction of tert -butylbis(trimethylsilyl)silyl potassium with pivaloyl chloride gave pivaloyl[ tert -butylbis(trimethylsilyl)]silane ( 1 ) in 89% yield. The cothermolysis of 1 with tert -butylacetylene at 140 °C for 24 h produced the mixture consisting of cis- and trans-1,2,3-tri( tert -butyl)-2-(trimethylsiloxy)-1-(trimethylsilyl)-1-silacyclobut-3-ene (cis- 2 and trans- 2 ) in a ratio of 0.7: 1, in 88% combined yield. The thermolysis of the mixture, cis- 2 and trans- 2 , at 250 °C for 24 h proceeded to give trans-1,2,4-tri( tert -butyl)-1-(trimethylsiloxy)-2-(trimethylsilyl)-1-silacyclobut-3-ene ( 4 ) as a single product in 96% yield. Similar treatment of cis- and trans- 2 at 190 °C for 15 h afforded silylcyclopropene 3 quantitatively, which underwent further isomerization at 250 °C to give trans-1-silacyclobut-3-ene 4 in quantitative yield.