Novel Sulfonated N-Heterocyclic Carbene Gold(I) Complexes: Homogeneous Gold Catalysis for the Hydration of Terminal Alkynes in Aqueous Media
作者:Ambroz Almássy、Csilla E. Nagy、Attila C. Bényei、Ferenc Joó
DOI:10.1021/om1001292
日期:2010.6.14
corresponding bis-carbene AgI complexes. Monocarbene AuI complexes were employed as catalysts in the hydration of terminal alkynes in aqueous media. Hydrations proceeded selectively according to Markovnikov’s rule with high rates and turnover numbers (up to TON 935). The highest activity was achieved in hydration of p-ethynylanisole (TOF = 400.2 h−1). Effects of additives (H2SO4, AgOTs, AgBF4, NaOH) were examined
通过对相应的双卡宾Ag I配合物进行重金属化反应,制备了一系列以磺化N-杂环咪唑基亚甲基苯为配体的新型水溶性Au I配合物。单卡宾Au I络合物在水性介质中末端炔烃的水合作用中用作催化剂。根据Markovnikov的规则,水合选择性地进行,具有高速率和周转数字(最高TON 935)。在对乙炔基苯甲醚的水合中获得最高的活性(TOF = 400.2 h -1)。检查了添加剂(H 2 SO 4,AgOTs,AgBF 4,NaOH)的影响。相应的双卡宾Au I配合物也被分离和表征。然而,这些在所探索的系统中不显示催化活性。