Carbocupration/Zinc Carbenoid Homologation and β-Elimination Reactions for a New Synthesis of Allenes − Application to the Enantioselective Synthesis of Chiral Allenes by Deracemization of sp3-Organometallic Derivatives
作者:Jos P. Varghese、Irena Zouev、Lionel Aufauvre、Paul Knochel、Ilan Marek
DOI:10.1002/1099-0690(200212)2002:24<4151::aid-ejoc4151>3.0.co;2-s
日期:2002.12
straightforward carbocupration/zinc homologation/β-elimination reaction sequence allows the one-pot synthesis of polysubstituted allenes from acetylenic sulfoxides in excellent isolated chemical yields. Secondary zinc carbenoids were used for the homologation reaction, and so a new synthesis of 1,1-diiodoalkanes is described. This methodology also allows the synthesis of chiral allenes through thermodynamic
一种新的、直接的碳化/锌同系化/β-消除反应序列允许从炔亚砜以优异的分离化学产率一锅法合成多取代的丙二烯。二级锌卡宾用于同系化反应,因此描述了 1,1-二碘烷烃的新合成。该方法还允许通过二级有机金属衍生物的热力学平衡来合成手性丙二烯。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2002)