A practical enantioselective synthesis of massoialactone via hydrolytic kinetic resolution
摘要:
An efficient enantioselective synthesis of (R)- and (S)-massoialactone has been achieved. The key steps are the hydrolytic kinetic resolution of a racemic epoxyheptane with (R,R)-(salen)-(CoOAc)-O-III complex and ring-closing metathesis of homoallylic alcohol derived acrylate esters using Grubb's catalyst. (C) 2003 Elsevier Ltd. All rights reserved.
Diastereoselective Dihydroxylation and Regioselective Deoxygenation of Dihydropyranones: A Novel Protocol for the Stereoselective Synthesis of C<sub>1</sub>−C<sub>8</sub> and C<sub>15</sub>−C<sub>21</sub> Subunits of (+)-Discodermolide
Diastereoselective dihydroxylation of dihydropyranones and subsequent regioselective alpha-deoxygenation provides 1,3-trans-beta-hydroxy-delta-lactones stereoselectively. This protocol has been applied for the synthesis of C-1-C-8 and C-15-C-21 subunits of (+)-discodermolide.