Organocatalytic Asymmetric Synthesis of<i>N</i>,<i>N</i>-Bis(dihydrofuranyl)hydroxyamines: A Cascade Reaction Involving Friedel–Crafts Alkylation, Internal Redox Reaction, and Umpolung
作者:Yoshihiro Sohtome、Takahisa Yamaguchi、Bongki Shin、Kazuo Nagasawa
DOI:10.1246/cl.2011.843
日期:2011.8.5
Stereoselective syntheses of N,N-bis(dihydrofuranyl)hydroxyamines from phenols and nitroolefins have been accomplished by means of cycle-specific catalysis with guanidine/bisthiourea organocatalyst and achiral base. Circumstantial evidence supports the idea that a nitroso intermediate participates in the dimerization, which involves internal redox reaction/umpolung.
已通过使用胍/双硫脲有机催化剂和非手性碱的环特异性催化,实现了从酚类和硝基烯烃合成N,N-双(四氢呋喃基)羟胺的立体选择性合成。间接证据支持亚硝基中间体参与二聚化反应的观点,该反应涉及内部氧化还原反应/反转。