The epoxidation of α,β-unsaturated compounds using tetrabutylammonium fluoride is described. This method has been demonstrated to be directly applicable to base-sensitive substrates such as cinnamaldehyde and α-phenylcinnamonitrile.
Dynamic Kinetic Asymmetric Ring-Opening/Reductive Amination Sequence of Racemic Nitroepoxides with Chiral Amines: Enantioselective Synthesis of Chiral Vicinal Diamines
作者:Juan Agut、Andreu Vidal、Santiago Rodríguez、Florenci V. González
DOI:10.1021/jo400501k
日期:2013.6.7
We report a highly diastereoselective synthesis of vicinaldiamines by the treatment of nitroepoxides with primary amines and then a reducing agent. When using a chiral primary amine, racemic nitroepoxides are transformed into chiral diamines as a single enantiomers (>95:5 er) through a dynamic kinetic asymmetric transformation (DYKAT). The overall process is a one-pot procedure combining the exposure
The first enantioselective synthesis of β-aryl-substituted α-nitroepoxides, exploiting an organocatalyzed aminolytic kinetic resolution (AKR), has been developed.
Regioselective Opening of Nitroepoxides with Unsymmetrical Diamines
作者:Yazdanbakhsh L. Nosood、Azim Ziyaei Halimehjani、Florenci V. González
DOI:10.1021/acs.joc.7b02795
日期:2018.2.2
by treatment with 2-aminobenzylamines, 2-aminopyridines, and N-alkyl 1,2-diaminobenzenes, respectively. Regioselectivity is controlled through attack of the most nucleophilic nitrogen of the unsymmetricaldiamine to the β position of the epoxide. These reactions represent an efficient way to prepare privileged bioactive structures.
Catalytic enantioselective epoxidation of nitroalkenes
作者:A. Vidal-Albalat、K. Świderek、J. Izquierdo、S. Rodríguez、V. Moliner、F. V. González
DOI:10.1039/c6cc03539f
日期:——
Nitroepoxides are potentially exploitable as synthons with vicinal electrophilic centers. Nevertheless, although advances have been made in the field, enantioselective epoxidation of nitroalkenes is still a challenging process. Herein we...