Synthesis of enantiopure (R)-(−)-massoialactone through ruthenium-SYNPHOS® asymmetric hydrogenation
摘要:
Total synthesis of enantiopure (R)-(-)-massoialactone was achieved. The key step includes the asymmetric hydrogenation of an achiral beta-keto ester using a ruthenium-SYNPHOS (R) catalyst to set the hydroxyl function in a stereocontrolled manner with excellent enantioselectivity (> 99% ee). Ring closing metathesis (RCM) in the presence of Grubbs' catalyst allows the final construction of the six-membered lactone. (c) 2007 Elsevier Ltd. All rights reserved.
Synthesis of enantiopure (R)-(−)-massoialactone through ruthenium-SYNPHOS® asymmetric hydrogenation
摘要:
Total synthesis of enantiopure (R)-(-)-massoialactone was achieved. The key step includes the asymmetric hydrogenation of an achiral beta-keto ester using a ruthenium-SYNPHOS (R) catalyst to set the hydroxyl function in a stereocontrolled manner with excellent enantioselectivity (> 99% ee). Ring closing metathesis (RCM) in the presence of Grubbs' catalyst allows the final construction of the six-membered lactone. (c) 2007 Elsevier Ltd. All rights reserved.