Scalable and Divergent Total Synthesis of (+)-Colletoic Acid, a Selective 11β-Hydroxysteroid Dehydrogenase Type 1 Inhibitor
摘要:
An efficient and divergent total synthesis of (+)-colletoic acid, a selective 11-beta hydroxysteroid dehydrogenase 1 (11-beta HSD1) inhibitor, is presented along with its biological activity at the whole-cell level. A scalable, asymmetric synthetic strategy was designed featuring a diversity-oriented synthesis utilizing a diastereoselective intramolecular 5-exo-Heck reaction as the key step to provide the quaternary spirocenter intermediate 9 in multigram scale, thus establishing a platform for further structure-activity relationship studies and providing access to other acorane family members.
Enantioselective Total Synthesis of (+)-Colletoic Acid via Catalytic Asymmetric Intramolecular Cyclopropanation of an α-Diazo-β-keto Diphenylphosphine Oxide
作者:Takashi Sawada、Masahisa Nakada
DOI:10.1021/ol303459x
日期:2013.3.1
The enantioselective totalsynthesis of (+)-colletoic acid, a potent naturally occurring 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) inhibitor, is described. This totalsynthesis features a highly enantioselective catalytic asymmetric intramolecular cyclopropanation of an α-diazo-β-keto diphenylphosphine oxide and five highly stereoselective reactions (cyclopropane opening, Diels–Alder reaction