Chemo-enzymatic synthesis of both enantiomers of rugulactone
作者:Gowrisankar Reddipalli、Mallam Venkataiah、Nitin W. Fadnavis
DOI:10.1016/j.tetasy.2010.01.016
日期:2010.3
The synthesis of both the (R)- and (S)-enantiomers of the natural product rugulactone has been achieved. Candida rugosa lipase hydrolyzes the butyrate ester of the protected 3-hydroxy homoallylic alcohol with very high enantioselectivity (E = 244) and provides the key intermediates with high enantiomeric purity (ee 98–99%) and excellent yields.
A simple and highly efficient stereoselective synthetic route has been developed for the synthesis of (R)-rugulactone, a 6-arylalkyl-5,6-dihydro-2H-pyran-2-one, from readily available substrates such as 1,3-propanediol and 3-phenyl-1-propanal employing Keck's asymmetric allylation and cross metathesis as key steps. (C) 2009 Elsevier Ltd. All rights reserved.