Meroterpenoid Synthesis via Sequential Polyketide Aromatization and Cationic Polyene Cyclization: Total Syntheses of (+)-Hongoquercin A and B and Related Meroterpenoids
作者:Tsz-Kan Ma、Daniel C. Elliott、Stephanie Reid、Andrew J. P. White、Philip J. Parsons、Anthony G. M. Barrett
DOI:10.1021/acs.joc.8b02095
日期:2018.11.2
were synthesized from commercially available trans, trans-farnesol in six and eleven steps, respectively, using dual biomimetic strategies with polyketide aromatization and subsequent polyene functionalizationfrom a common farnesyl-resorcylate intermediate. Key steps involve Pd(0)-catalyzed decarboxylative allylic rearrangement of a dioxinone β,δ-diketo ester to a β,δ-diketo dioxinone, which was readily
Synthesis and Absolute Configuration of Hongoquercin B, a Sesquiterpene-substituted Orsellinic Acid Isolated as a Fungal Metabolite
作者:Hisayuki TSUJIMORI、Kenji MORI
DOI:10.1271/bbb.64.1410
日期:2000.1
(+)-Hongoquercin B (1), a weakly antibacterial fungal metabolite, was synthesized by starting from (S)-3-hydroxy-2,2-dimethylcyclohexanone, and its absolute configuration was determined as depicted by structure 1.