[GRAPHICS]The diastereoselective hetero-Diels-Alder reaction between Danishefsky's diene and chiral aldehydes is catalyzed by chiral chromium-Schiff base complexes. High levels of catalyst control are obtained in several cases, allowing access to all four stereoisomeric products through appropriate choice of aldehyde and catalyst enantiomers.
Asymmetric hetero Diels-Alder reactions of Danishefsky's diene and glyoxylate esters catalyzed by chiral bisoxazoline derived catalysts
作者:Arun K. Ghosh、Packiarajan Mathivanan、John Cappiello、K. Krishnan
DOI:10.1016/0957-4166(96)00261-3
日期:1996.8
AsymmetricheteroDiels-Alderreactions of Danishefsky's diene and glyoxylate esters catalyzed by bis(oxazoline)-metal complex afforded the corresponding aldol adduct which upon treatment with trifluoroacetic acid furnished the heteroDiels-Alder product in 72% enantiomeric excess and 70% isolated yield.
Chelation-controlled facially selective cyclocondensation reactions of chiral alkoxy aldehydes: syntheses of a mouse androgen and of a carbon-linked disaccharide
作者:Samuel J. Danishefsky、William H. Pearson、Daniel F. Harvey、Clarence J. Maring、James P. Springer
DOI:10.1021/ja00291a027
日期:1985.3
Cram rule selectivity in the Lewis acid catalyzed cyclocondensation of chiral aldehydes. A convenient route to chiral systems of biological interest
作者:Samuel Danishefsky、Susumu Kobayashi、James F. Kerwin
DOI:10.1021/jo00349a037
日期:1982.5
Synthetic studies on bryostatins, antineoplastic metabolites: Convergent synthesis of the C1-C16 fragment shared by all of the bryostatin family
The C1-C-16 fragment of bryostatins could successfully be synthesized by tandem connection of the appropriate three fragments and effective introduCtion of the alpha,beta-unsaturated esters at the C-13 position.
DANISHEFSKY, S.;KOBAYASHI, SUSUMU;KERWIN, J. F., J. ORG. CHEM., 1982, 47, N 10, 1981-1983
作者:DANISHEFSKY, S.、KOBAYASHI, SUSUMU、KERWIN, J. F.