Oxygen Switch in Visible-Light Photoredox Catalysis: Radical Additions and Cyclizations and Unexpected C–C-Bond Cleavage Reactions
作者:Shaoqun Zhu、Arindam Das、Lan Bui、Hanjun Zhou、Dennis P. Curran、Magnus Rueping
DOI:10.1021/ja309580a
日期:2013.2.6
oxygen, a radical addition/cyclization reaction occurred which resulted in the formation of tetrahydroquinoline derivatives in good yields under mild reaction conditions. The intramolecular version of the radical addition led to the unexpected formation of indole-3-carboxaldehyde derivatives. Mechanistic investigations of this reaction cascade uncovered a new photoredoxcatalyzed C-C bond cleavage reaction
Borane Catalyzed Redox Isomerization of 2‐Amino Chalcones: Hydride Abstraction or Hydride Migration?
作者:Rundong Zhou、Jan Paradies
DOI:10.1002/ejoc.202100883
日期:2021.12.14
The borane catalyzed redox isomerization of 2-amino chalocones was developed. Mechanistic investigations by kinetic, isotopic labelling, and competition experiments as well as computational studies corroborate the concerted [1,5] hydride shift as operative mechanism. The redox isomerization products are obtained in high yield and up to >95 : 5 diastereoselectivity.