128261-61-0Relevant articles and documents
Total Syntheses of Sarcandrolide J and Shizukaol D: Lindenane Sesquiterpenoid [4+2] Dimers
Yuan, Changchun,Du, Biao,Deng, Heping,Man, Yi,Liu, Bo
, p. 637 - 640 (2017)
The syntheses of members of a family of lindenane sesquiterpenoid [4+2] dimers led to the total syntheses of sarcandrolide J and shizukaol D. Inspired by a modified biosynthetic pathway, a cascade featuring furan formation/alkene isomerization/Diels–Alder cycloaddition was devised to construct the congested polycyclic architecture of the target molecules with the correct stereochemistry. This study presents a pioneering synthetic entry to this family of natural products and paves the way for fully exploring their biological functions.
Bioinspired total synthesis of bolivianine: A diels-alder/intramolecular hetero-Diels-Alder cascade approach
Yuan, Changchun,Du, Biao,Yang, Li,Liu, Bo
supporting information, p. 9291 - 9294 (2013/07/26)
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.
A Key Intermediate for the Chiral Synthesis of Elemanoids. Synthesis of (+)-β-Elemenone
Kato, Michiharu,Vogler, Bernhard,Tooyama, Youichi,Yoshikoshi,Akira
, p. 151 - 154 (2007/10/02)
(1R,5S)-3-Phenylsulfenyl-6,6-dimethylbicycloheptanone obtained from (+)-nopinone was transformed into (1R,4S,5S)-4-methyl-4-vinylbicycloheptan-2-one, whose cyclobutane ring was cleaved with BF3*EtO2-Zn(OAc)2 in acetic anhydride to provide (4S,5S)-1-acetoxy-4-isopropenyl-5-methyl-5-vinyl-1-cyclohexene (5), the key intermediate, in a highly regio- and stereoselective manner.Regioselective introduction of a three-carbon unit to 5 with acetone followed by dehydration yielded (+)-β-elemenone.