Molecular and crystal structure of 1,1-bis(tert-butyldimethylsilyl)-2,2-bis(trimethylsilyl)ethylene, the most twisted known olefin, and unusual rearrangement during its preparation
Preparation of ethynylsilanes from polychloroethylenes
作者:Robert West、Laverne C. Quass
DOI:10.1016/s0022-328x(00)80233-8
日期:1969.7
chloroethylenes are described. Symmetrical bis(trialkylsilyl)acetylenes are obtained in good yield from tetrachloroethylene, lithium and trialkylhalosilanes at −80° in tetrahydrofuran. When lithium and tetrachloroethylene are similarly allowed to react at −80° and then quenched with organosilicon halides, (chloroethynyl)triorganosilanes, R3SiCCCl, are produced. These can be coupled with lithium and chlorosilanes
Polylithium compounds. 10. Preparation and chemistry of polylithiated 2,4-hexadiyne
作者:Witta Priester、Robert West
DOI:10.1021/ja00442a019
日期:1976.12
Alkynylation of Benzotriazole with Silylethynyliodonium Triflates. Regioselective Synthesis of 2-Ethynyl-2<i>H</i>-benzotriazole Derivatives
作者:Tsugio Kitamura、Mohammad Hasan Morshed、Satoru Tsukada、Yuki Miyazaki、Naomi Iguchi、Daisuke Inoue
DOI:10.1021/jo2015467
日期:2011.10.7
Phenyl(trimethylsilylethynyl)iodonium and tert-butyldimethylsilylethynyl(phenyl)iodonium triflates were applied to alkynylation of benzotriazole. Treatment of the silylethynyliodonium triflates with the potassium salt of benzotriazole ion in (BuOH)-Bu-t and CH2Cl2 gave 2-(trimethylsilylethynyl)-2H-1,2,3-benzotriazole and 2-(tert-butyldimethylsilylethynyl)-2H-1,2,3-benzotriazole in 74% and 76% yields, respectively. The regioisomers, 1-silylethynyl-1H-1,2,3-benzotriazole derivatives, were minor. In both cases of the silyl-substitued ethynyliodonium salts, novel regioselective alkynylation of benzotriazole at the 2 position was observed.