Bioinspired Total Synthesis of Bolivianine: A Diels– Alder/Intramolecular Hetero-Diels–Alder Cascade Approach
作者:Changchun Yuan、Biao Du、Li Yang、Bo Liu
DOI:10.1021/ja4040335
日期:2013.6.26
We report the first total synthesis of bolivanine in a 14 step pathway involving the synthesis of onoseriolide. Our synthesis features a palladium-catalyzed intramolecular cyclopropanation involving an allylic metal carbene and a Diels-Alder/intramolecular hetero-Diels-Alder cascade, allowing the single-step assembly of a tricyclic system with proper configuration. The synthetic efforts validate our modified biogenetic hypothesis and allow us to confirm the absolute configuration of bolivianine.
Asymmetric Total Synthesis of Onoseriolide, Bolivianine, and Isobolivianine
efforts on the total synthesis of bolivianine (1) and isobolivianine (2), involving the synthesis of onoseriolide (3). The first generation synthesis of bolivianine was completed in 21 steps by following a chiral resolution strategy. Based on the potential biogenetic relationship between bolivianine (1), onoseriolide (3), and β‐(E)‐ocimene (8), the second generation synthesis of bolivianine was biomimetically