High diastereoselectivity in Claisen rearrangement in a sterically congested cyclopentane system. Total synthesis of (±)-β-necrodol
摘要:
Total synthesis of the monoterpene beta -necrodol has been accomplished. The key step involves an ortho-ester Claisen rearrangement in a highly sterically congested cyclopentane derivative resulting in a high level of 1,3-trans diastereoselection. A novel photo-induced decarboxylation of the obtained gamma,delta -unsaturated acid afforded beta -necrodol. (C) 2001 Elsevier Science Ltd. All rights reserved.
Stereocontrolled total synthesis of (±)-β-necrodol
摘要:
A total synthesis of racemic beta-necrodol is described using an ortho-ester Claisen rearrangement as the key step to dictate a high level of trans-1,3-diastereoselection on a cyclopentane derivative. (C) 1999 Elsevier Science Ltd. All rights reserved.