An Alternative Stereoselective Total Synthesis of (+)-Cephalosporolide D

An efficient stereoselective total synthesis of (+)-Cephalosporolide D from commercially available and inexpensive starting material, (±)-propylene epoxide, is described. The key steps involved in this synthesis are α- aminoxylation catalyzed by L-proline, followed by in situ reduction using NaBH4 and Yamaguchi macrolactonization.