Acid-catalyzed reactions of (3-(naphthalen-2-yl)-2,2-bis(trimethylsilyl)oxiran. A new synthesis of functional-group-substituted vinylsilanes
作者:Kazem D. Safa、Farnaz Behmagham、Khatereh Ghorbanpour
DOI:10.1016/j.jorganchem.2011.02.024
日期:2011.5
The magnesium bromide-diethyl etherate-catalyzed ring-opening of (3-(naphthalen-2-yl)-2,2-bis(trimethylsilyl)oxiran 2 with thiophenols affords (1-trimethylsilylvinyl)sulfides 3 and the (1-bromovinyl)silane 4. Nucleophilic attack occurs regioselectively at the position α- to silicon. The compound 2 has been converted into the (1-trimethylsilylvinyl)amide 5 with an excess of acetonitrile and into the
溴化镁-二乙基醚化物催化的(3-(萘-2-基)-2,2-双(三甲基硅烷基)环氧乙烷2与硫酚的开环反应)提供(1-三甲基硅烷基乙烯基)硫化物3和(1-溴乙烯基)硅烷4.亲核性攻击发生在区域α-上,对硅区域选择性地发生,化合物2已与过量的乙腈转化为(1-三甲基硅烷基乙烯基)酰胺5,并与乙酸/乙酸转化为乙酸(1-三甲基硅烷基乙烯基)乙酸酯6。酸酐:这些反应在催化量的三氟化硼-乙醚中进行,仅用乙酸处理2即可得到萘甲醛,环氧化物2也与MgBr 2 OEt 2,MeLi / CuI,HX(X Br或Cl)和LiAlH 4发生反应,并在双(三甲基甲硅烷基)取代的碳上发生亲核攻击。