Reductive amination of various ketones and aldehydes by transferhydrogenation under aqueous conditions has been developed, by using cyclometallated iridium complexes as catalysts and formate as hydrogen source. The pH value of the solution is shown to be critical for a high catalytic chemoselectivity and activity, with the best pH value being 4.8. In comparison with that in organic solvents, the reductive
作者:R. Ian Storer、Diane E. Carrera、Yike Ni、David W. C. MacMillan
DOI:10.1021/ja057222n
日期:2006.1.1
The first enantioselectiveorganocatalyticreductive amination reaction has been accomplished. The development of a new chiral phosphoric acid catalyst has provided a convenient strategy for the enantioselective construction of protected primary amines and provided a highly stereoselective method for the reductive amination of heterocyclic amines. A diverse spectrum of ketone and amine substrates can
The catalytic transfer hydrogenation of imines and the reductive amination of carbonyl compounds have been thoroughly investigated with a cyclooctene‐derived (cyclopentadienone)iron pre‐catalyst. Additionally, enantioselective ketimine reduction with a chiral (cyclopentadienone)ironcomplex is reported here for the first time.
Enantioselective organocatalytic reductive amination of aliphatic ketones by benzothiazoline as hydrogen donor
作者:Kodai Saito、Takahiko Akiyama
DOI:10.1039/c2cc31486j
日期:——
The chiral phosphoric acid-catalyzed enantioselectivereductiveamination of aliphatic ketones with aromatic amines was successfully achieved by the use of benzothiazoline as the hydrogen donor. Corresponding chiral aliphatic amines were obtained with excellent enantioselectivities.