Exceedingly Concise and Elegant Synthesis of (+)-Paniculatine, (−)-Magellanine, and (+)-Magellaninone
作者:Kuo-Wei Lin、Bakthavachalam Ananthan、Sheng-Fang Tseng、Tu-Hsin Yan
DOI:10.1021/acs.orglett.5b01975
日期:2015.8.7
Starting from inexpensive (+)-pulegone as the chiral building block, a highly convergent synthesis of the unusual diquinane-based structures of (+)-paniculatine (1), (-)-magellanine (2), and (+)-magellaninone (3), has been achieved. This approach is based upon a tandem acylationalkylation of ketoester 8 and palladium-catalyzed olefin insertion, oxidation, and hydrogenation for construction of the tetracyclic framework. This exceedingly concise strategy, requiring only 1214 steps, is the shortest to date.