Substituted lithiumtrimethylsiloxysilanides LiSiRR′(OSiMe3) – Investigations of their synthesis, stability and reactivity
作者:Joerg Harloff、Eckhard Popowski、Helmut Reinke
DOI:10.1016/j.jorganchem.2006.11.033
日期:2007.3
undergo partially self-condensation to afford the corresponding trimethylsiloxydisilanyllithiums Me3SiO(RR′Si)2Li (3a–g). (Me3)Si–O bond cleavage was observed for 2e and 2g–i. The relatively stable trimethylsiloxysilyllithiums 2f, 2g and 2i react with n-butyllithium under nucleophilic butylation to give the n-butyl-substituted silyllithiums nBuRR′SiLi (15g, 15f, 15i), which were trapped with Me3SiCl
三甲基甲硅烷氧基氯硅烷(Me 3 SiO)RR'SiCl(1a – h:R'= Ph,1a:R = H,1b:R = Me,1c:R = Et,1d:R = i Pr,1e: R = t Bu,1f:R = Ph,1g:R = 2,4,6-Me 3 C 6 H 2(Mes),1h:R = 2,4,6-(Me 2 CH)3 C 6 H 2(小费); 1i:R = R'= Mes),在-78°C的四氢呋喃(THF)中和在-110°C的THF /二乙醚/正戊烷的体积比为4:1:1的混合物中生成锂金属,生成:多种化合物的混合物。取决于取代基甲硅烷基锂衍生物(Me 3 SiO)RR'SiLi(2b - i),Me 3 SiO(RR'Si)2 Li(3a - g),Me 3 SiRR'SiLi(4a - h),(LiO) RR'SiLi(12e,12g – i),三硅氧烷(Me 3 SiO)2 SiRR'(5a