Lewis Acid-Catalyzed Conjugate Additions of Silyloxyallenes: A Selective Solution to the Intermolecular Rauhut−Currier Problem
作者:Troy E. Reynolds、Michael S. Binkley、Karl A. Scheidt
DOI:10.1021/ol800745q
日期:2008.6.1
10 mol % Sc(OTf) 3. The reaction delivers intermolecular Rauhut-Currier products in excellent yields and regioselectivities for a wide scope of substrates. Notably, the formal cross-coupling of two different alpha,beta-unsaturated carbonyl compounds (a cross Rauhut-Currier reaction) is achieved. Preliminary investigations have demonstrated good levels of enantioselectivity for the addition of a racemic
甲硅烷氧基丙二烯用作非常有用的 α-酰基乙烯基阴离子等价物。在 10 mol % Sc(OTf) 3 的存在下,这些潜在的烯丙酸酯与亚烷基丙二酸酯发生共轭加成。该反应以优异的产率和区域选择性为广泛的底物提供分子间 Rauhut-Currier 产物。值得注意的是,实现了两种不同的 α,β-不饱和羰基化合物的正式交叉偶联(交叉 Rauhut-Currier 反应)。初步研究表明,外消旋甲硅烷氧基丙二烯与手性路易斯酸的加成具有良好的对映选择性。