Asymmetric synthesis of tetrahydrolipstatin and valilactone
摘要:
The highly diastereoselective aldol reaction between acyl complexes of the iron chiral auxiliary [(eta(5)-C5H5)Fe(CO)(PPh3)] and beta-hydroxy aldehydes (obtained via a Noyori asymmetric hydrogenation), followed by a tandem oxidative decomplexation-cyclisation process gives access to beta-substituted and alpha,beta-disubstituted beta-lactones in high ee. This methodology has been employed in the asymmetric syntheses of tetra hydrolipstatin and valilactone. (C) 2008 Elsevier Ltd. All rights reserved.
Asymmetric synthesis of tetrahydrolipstatin and valilactone
摘要:
The highly diastereoselective aldol reaction between acyl complexes of the iron chiral auxiliary [(eta(5)-C5H5)Fe(CO)(PPh3)] and beta-hydroxy aldehydes (obtained via a Noyori asymmetric hydrogenation), followed by a tandem oxidative decomplexation-cyclisation process gives access to beta-substituted and alpha,beta-disubstituted beta-lactones in high ee. This methodology has been employed in the asymmetric syntheses of tetra hydrolipstatin and valilactone. (C) 2008 Elsevier Ltd. All rights reserved.