Total Synthesis of (±)-Tremulenolide A and (±)-Tremulenediol A via a Stereoselective Cyclopropanation/Cope Rearrangement Annulation Strategy
作者:Huw M. L. Davies、Brian D. Doan
DOI:10.1021/jo971577a
日期:1998.2.1
Short total syntheses of (+/-)-tremulenolide A (1) and (+/-)-tremulenediol A (2) are described. The critical step is a dirhodium tetracarboxylate-catalyzed tandem cyclopropanation/Cope rearrangement between the vinyldiazoacetate 4 and the 2(Z),4(E)-hexadiene 5. This step results in full control of the relative stereochemistry at the three stereogenic centers that exist in the natural products. Due