Catalytic Asymmetric Direct Vinylogous Michael Addition of γ-Aryl-Substituted Deconjugated Butenolides to Nitroolefins and N-Phenylmaleimide
作者:Santanu Mukherjee、Vikas Kumar、Bidisha Ray、Preeti Rathi
DOI:10.1055/s-0033-1338705
日期:——
99:1) and high diastereoselectivities (dr up to >20:1). Direct asymmetric vinylogous Michael reactions of γ-aryl-substituted deconjugated butenolides with nitroolefins and N-phenylmaleimide are described using bifunctional thiourea derivatives as the catalyst. The resulting butenolide derivatives containing adjacent quaternary and tertiary stereocenters are obtained in good yields (54–90%) and with excellent
摘要 描述了使用双官能硫脲衍生物作为催化剂的γ-芳基取代的共轭丁烯化物与硝基烯烃和N-苯基马来酰亚胺的直接不对称乙烯基迈克尔反应。得到的丁烯内酯衍生物含有相邻的四级和三级立体中心,收率好(54-90%),具有出色的对映选择性(er高达99:1)和高非对映选择性(dr高达> 20:1)。 描述了使用双官能硫脲衍生物作为催化剂的γ-芳基取代的共轭丁烯化物与硝基烯烃和N-苯基马来酰亚胺的直接不对称乙烯基迈克尔反应。得到的丁烯内酯衍生物含有相邻的四级和三级立体中心,收率好(54-90%),具有出色的对映选择性(er高达99:1)和高非对映选择性(dr高达> 20:1)。