Copper-Catalyzed Hydrostannation of Activated Alkynes
作者:Lai To Leung、Sze Kar Leung、Pauline Chiu
DOI:10.1021/ol052129p
日期:2005.11.1
[(Ph3P)CuH](6) effectively catalyzes the hydrostannation of activated alkynes with exclusive regioselectivity for alpha-stannation. Syn hydrostannation is observed exclusively for alkynoates. Anti or syn hydrostannation adducts are obtained as products for alkynone substrates.
Copper(II)-Catalyzed Silylation of Activated Alkynes in Water: Diastereodivergent Access to<i>E</i>- or<i>Z</i>-β-Silyl-α,β-Unsaturated Carbonyl and Carboxyl Compounds
作者:Joseph A. Calderone、Webster L. Santos
DOI:10.1002/anie.201310695
日期:2014.4.14
Copper(II)‐catalyzed silylation of substituted alkynylcarbonyl compounds was investigated. Through the activation of Me2PhSiBpin in water at room temperature and open atmosphere, vinylsilanes conjugated to carbonyl groups are synthesized in high yield. A surprising diastereodivergent access to olefin geometry was discovered using a silyl conjugate addition strategy: aldehydes and ketones were Z selective
研究了铜(II)催化的取代炔基羰基化合物的硅烷化反应。通过在室温和开放气氛下在水中活化 Me 2 PhSiBpin,可以高产率合成与羰基共轭的乙烯基硅烷。使用甲硅烷基共轭加成策略发现了对烯烃几何形状的惊人非对映发散途径:醛和酮具有 Z 选择性,而酯和酰胺仅转化为E 产物。