dialkyl-substituted dibenzosiloles. 1-Methyl-3,4-diphenyl-1,2,5-tris(trimehylsilyl)silole reacted with methyllithium in THF to give 1,1-dimethyl-3,4-diphenyl-2,2,5-tris(trimethylsilyl) silole. Similarly, both 2,4-diphenyl-1,1,3,5-tetrakis(trimethylsilyl)silole and 4,5-diphenyl-1,1,2,3-tetrakis(trimethylsilyl)silole with methyllithium afforded two isomers of 1-methyl-2,4-diphenyl-1,2,3,5-tetrakis(t
The chemistry of siloles. Synthesis and reactions of η6-[1-methyl-1-(trimethylsilyl)dibenzosilacyclopentadiene]chromium tricarbonyl
作者:Mitsuo Ishikawa、Tatsuru Tabohashi
DOI:10.1016/0022-328x(84)85194-3
日期:1984.8
adiene]chromiumtricarbonyl (II) was prepared by the reaction of 1-methyl-1-(trimethylsilyl)dibenzosilole with chromium hexacarbonyl. The reaction of II with methyllithium in THF gave η6-(1,1-dimethyldibenzosilacyclopentadiene)chromiumtricarbonyl. Similar reaction of II with butyllithium, followed by oxidation, gave 1-butyl-1-methyldibenzosilole and 1,1-dibutyldibenzosilole, while reaction with (
η 6 - [1-甲基-1-(三甲基硅烷基)dibenzosilacyclopentadiene]三羰基铬(II)是由1-甲基-1-(三甲基硅烷基)二苯并噻咯与六羰基铬反应制得。II的在THF甲基锂反应,得到η 6 - (1,1-二dimethyldibenzosilacyclopentadiene)三羰基铬。II与丁基锂的类似反应,然后氧化,得到1-丁基-1-甲基二苯甲酚和1,1-二丁基二苯甲酚,而在相似条件下与(甲基二苯基甲硅烷基)锂反应,得到1-甲基-4-(甲基二苯基甲硅烷基)-1-(三甲基甲硅烷基)二苯并甲硅烷基。
Design and synthesis of novel ROR inverse agonists with a dibenzosilole scaffold as a hydrophobic core structure
Molecular structure calculations indicated that the dibenzosilole skeleton could be well superposed on phenanthridinone, which is a structural component of ligands of retinoic acid receptor-related orphan receptors (RORs). Therefore, we designed, synthesized and biologically evaluated a series of novel ROR ligands based on the dibenzosilole scaffold as a hydrophobic core structure. Dibenzosilole derivatives bearing a hexafluoro-2-hydroxypropyl group on the benzene ring exhibited significant ROR-inhibitory activity, comparable to that of the lead phenanthridinone derivative 5. Our results indicate that the dibenzosilole skeleton would be a useful scaffold for developing novel biologically active compounds, and that cis-amide structure can be replaced by an alkylsilyl functionality. (C) 2015 Elsevier Ltd. All rights reserved.
Unexpected behavior of siloles toward organolithium reagents