Synthetic studies on C14 cembranoids: synthesis of C4–12 fragment of sarcophytonolides E–G and L and C5–11 fragment of sarcophytonolide L
摘要:
An efficient stereoselective synthesis of C4-12 fragment of the cembranoids, sarcophytonolides E-G and L and C5-11 fragment of sarcophytonolide L is described. The C4-12 building block is efficiently assembled starting from chiral pool material (R)-carvone employing the Baeyer-Villiger oxidation, modified Knoevenagel condensation and asymmetric dihydroxylation as the key steps. The synthesis of C5-11 fragment is based on orthoester Johnson-Claisen rearrangement as the key step. (C) 2010 Elsevier Ltd. All rights reserved.