Hydroaluminierung von Silicium-zentrierten Dialkinen - Synthese gemischt-substituierter Alkenyl-alkinylsilane
作者:Werner Uhl、Denis Heller
DOI:10.1002/zaac.200900323
日期:2010.3
Bis(phenylethynyl)silanes reacted with equimolar quantities of various dialkylaluminium hydrides, R2Al–H [R = CH2tBu, tBu, iBu, CH(SiMe3)2], by hydroalumination and addition of a Al–H bond to a C≡C triple bond. Alkenyl-alkynylsilanes were formed, which had the aluminium atoms in geminal positions with the silicon atoms and adopt a cis arrangement of aluminium and hydrogen at the resulting C=C double
双(苯基乙炔基)硅烷与等摩尔量的各种二烷基氢化铝反应,R2Al–H [R = CH2tBu, tBu, iBu, CH(SiMe3)2],通过加氢铝化和将 Al–H 键添加到 C≡C 三键. 形成了烯基-炔基硅烷,其中铝原子与硅原子处于孪生位置,并且在大多数情况下在所得的 C=C 双键处采用铝和氢的顺式排列。顺式/反式重排与反式加成产物的形成仅观察到两种空间屏蔽最少的化合物。通过叔丁基和新戊基衍生物的晶体结构测定,检测到配位不饱和铝原子与完整炔基的 α-碳原子的分子内相互作用,