2,4,6-Tri-tert.butylphenyl-substituierte Silane

2,4,6-Tri-tert.butylphenyl Substituted Silanes 2,4,6-Tri-tert.butylphenyl lithium reacts with trimethoxysilane, triethoxysilane, and triphenoxysilane to give the dialkoxy- or diphenoxy-(2,4,6-tri-tert.butylphenyl)-silanes Ar? SiH(OR¹)₂ 3 ? 5 (Ar = 2,4,6-tri.tert.butylphenyl, R¹ = Me, Et, Ph). Interaction of methyl lithium or n-butyl lithium with 3 – 5 leads under partial or complete substitution of the OR¹-functions to the silanes Ar? SiH(OR¹)R² 7 – 11 and Ar? SiHR₂² 12 and 13 (R² = Me, Bu). Reaction of 3 with lithium tert.butul-amide gives tert.butylamino-methoxy-(2,4,6-tri-tert.butylphenyl)-silane 14 . 5 is reduced by LiAlH₄ to 2,4,6-tri-tert.butylphenyl-silane 6 . The reaction of 3 with antimony trifluoride results in formation of 2,4,6-tri-tert.butylphenyl trifluorosilane 2 . Attempts to replace the alkoxy or phenoxy groups in 3 – 5 by chlorine led under silion carbon bond cleavage to 1,3,5-tri-tert.butylbenzene.