作者:Teruaki Mukaiyama、Nobuharu Iwasawa、Rodney W. Stevens、Toru Haga
DOI:10.1016/s0040-4020(01)82423-6
日期:1984.1
A highly diastereoselective cross aldolreaction is developed using divalent tin enolates formed from stannous trifluoromethanesulfonate and carbonyl compounds. The reaction is extended to a highly enantioselective cross aldolreaction employing chiral diamines derivedfrom (S)-proline as ligands.
A Highly Efficient Large-Scale Asymmetric Direct Intermolecular Aldol Reaction Employing L-Prolinamide as a Recoverable Catalyst
作者:Yang Yang、Yan-Hong He、Zhi Guan、Wei-Da Huang
DOI:10.1002/adsc.201000355
日期:2010.10.4
A new, simple bifunctional, recoverable and reusable L-prolinamide organocatalyst that promotes aldolreactions while achieving a respectable level of enantioselectivity is reported. This organocatalyst is applicable to the reactions of a wide range of aromatic and heteroaromatic aldehydes with cyclic and acyclic ketones, and the anti-aldol products could be obtained with up to 99:1 anti/syn ratio
Enantioselective aldol reactions using chiral lithium amides as a chiral auxiliary
作者:Akira Ando、Takayuki Shioiri
DOI:10.1039/c39870001620
日期:——
The enantioselectivealdolreaction of ethyl t-butyl ketone with benzaldehyde in the presence of chiral ligands has been thoroughly investigated. With the lithium amide derived from 2-isopropylamino-1-methoxy-3-methylbutane (3c) as chiral ligand, a chemical yield of 93% and 68% enantiomeric excess were realized.
[GRAPHICS]Highly chemo-, diastereo-, and enantioselective borohydride reduction of 2-substituted-1,3-diketones was achieved in the presence of the optically active beta -ketoiminato cobalt complex catalysts to afford the optically active 2-substituted-3-hydroxyketones. The present catalytic and enantioselective reduction could provide an alternative potential for preparation of optically active ant aldol-type compounds.
MUKAIYAMA, TERUAKI;IWASAWA, NOBUHARU;STEVENS, R. W.;HAGA, TORU, TETRAHEDRON, 1984, 40, N 8, 1381-1390
作者:MUKAIYAMA, TERUAKI、IWASAWA, NOBUHARU、STEVENS, R. W.、HAGA, TORU