A New Approach to the Synthesis of Unsymmetrical Disilenes and Germasilene: Unusual <sup>29</sup>Si NMR Chemical Shifts and Regiospecific Methanol Addition
作者:Masaaki Ichinohe、Yoriko Arai、Akira Sekiguchi、Nozomi Takagi、Shigeru Nagase
DOI:10.1021/om010419d
日期:2001.10.1
The reaction of dilithiosilanes (iPr3Si)2SiLi2 (1a) and (tBu2MeSi)2SiLi2 (1b) with diaryldichlorosilanes [Ar2SiCl2, Ar = Mes (2,4,6-trimethylphenyl) and Tip (2,4,6-triisopropylphenyl)] quantitatively produced the corresponding unsymmetrical 1,1-diaryl-2,2-bis(trialkylsilyl)disilenes, Ar2SiSi(SiR3)2 (2, R3Si = iPr3Si; 3, R3Si = tBu2MeSi). A stable germasilene, Mes2GeSi(SiMetBu2)2 (4), was also synthesized
二硫代硅烷(i Pr 3 Si)2 SiLi 2(1a)和(t Bu 2 MeSi)2 SiLi 2(1b)与二芳基二氯硅烷[Ar 2 SiCl 2,Ar = Mes(2,4,6-三甲基苯基)和尖端(2,4,6-三异丙基苯基)]定量产生相应的不对称1,1,1-二芳基-2,2-双(三烷基甲硅烷基)二烯酮Ar 2 Si Si(SiR 3)2(2,R 3 Si = i Pr 3 Si; 3,R 3 Si =t Bu 2 MeSi)。通过1b与二甲基二氯锗烷的反应,还合成了稳定的胚芽,Mes 2 Ge Si(SiMe t Bu 2)2(4)。这些化合物显示出异常的29 Si NMR位移和区域选择性甲醇的添加。