Enantioselective and Regiodivergent Functionalization of<i>N-</i>Allylcarbamates by Mechanistically Divergent Multicatalysis
作者:Edward Richmond、Ismat Ullah Khan、Joseph Moran
DOI:10.1002/chem.201602792
日期:2016.8.22
A pair of mechanistically divergent multicatalytic reaction sequences has been developed consisting of nickel‐catalyzed isomerization of N‐allylcarbamates and subsequent phosphoric‐acid‐catalyzed enantioselective functionalization of the resulting intermediates. By appropriate selection of reaction partners, in situ generated imines and ene‐carbamates are mechanistically partitioned to yield opposing
Aza-[2,3]-Wittig sigmatropic rearrangement of crotyl amines
作者:James C. Anderson、D. Craig Siddons、Stephen C. Smith、Martin E. Swarbrick
DOI:10.1039/c39950001835
日期:——
The first example of an acyclic aza-[2,3]-Wittig sigmatropic rearrangement is presented, and its application to the synthesis of unnatural amino acids is described.
Asymmetric allylic amination catalyzed by chiral ferrocenylphosphine-palladium complexes
作者:Tamio Hayashi、Kohei Kishi、Akihiro Yamamoto、Yoshihiko Ito
DOI:10.1016/s0040-4039(00)88870-x
日期:1990.1
A palladiumcomplex bearing chiral (hydroxyalkyl)ferrocenylphosphine ligand was found to be a highly regio-and stereoselective catalyst for the asymmetric allylic amination of 2-butenyl acetates with benzylamine, the nucleophilicattack of the amine taking place selectively on the more substituted end of the π-allylpalladium intermediate to give optically active 3-benzyamino- 1-butene of up to 84%