Biomimetic Enantioselective Total Synthesis of (−)-Mycoleptodiscin A
作者:Dattatraya H. Dethe、Susanta Kumar Sau、Samarpita Mahapatra
DOI:10.1021/acs.orglett.6b03292
日期:2016.12.16
Biomimetic totalsynthesis of (-)-mycoleptodiscin A (1) was achieved starting from the enantiopure key intermediate, which was prepared by Friedel-Crafts reaction between 7-methoxyindole and chiral primary allylic alcohol. The crucial step in this synthesis was an intramolecular Friedel-Crafts reaction at C-4 of the indole derivative driven by the EDG/EWG within a compound that was rationally designed
Synthesis of Phosphatidylinositol 3-Kinase (PI3K) Inhibitory Analogues of the Sponge Meroterpenoid Liphagal
作者:Alban R. Pereira、Wendy K. Strangman、Frederic Marion、Larry Feldberg、Deborah Roll、Robert Mallon、Irwin Hollander、Raymond J. Andersen
DOI:10.1021/jm100531u
日期:2010.12.23
Analogues of the spongemeroterpenoid liphagal (1) have been synthesized and evaluated for inhibition of PI3Kα and PI3Kγ as part of a program aimed at developing new isoform-selective PI3K inhibitors. One of the analogues, compound 24, with IC50 values of 66 nM against PI3Kα and 1840 nM against PI3Kγ, representing a 27-fold preference for PI3Kα, exhibited enhanced chemical stability and modestly enhanced
Regiodivergent Remote Arylation of Cycloalkanols to Dysideanone′s Fused Carbotetracycles and Its Bridged Isomers
作者:Md Ashraful Haque、Chandan K. Jana
DOI:10.1002/chem.201703094
日期:2017.9.27
arylations across an all‐carbonquaternarycenter of cycloalkanols to access enantioenriched fused and bridged carbotetracycles are reported. The conformation of the carbocation guided either sequential stereospecific β‐C‐Me/γ‐C−H‐shifts or β‐C‐Me/γ′‐C−H‐shifts, providing fused carbotetracyclic analogs of dysideanone or bridged tetracycles, respectively. The reaction is highly stereoselective in building three
Nature-inspired development of unnatural meroterpenoids as the non-toxic anti-colon cancer agents
作者:Md Ashraful Haque、Bethsebie L. Sailo、Ganesan Padmavathi、Ajaikumar B. Kunnumakkara、Chandan K. Jana
DOI:10.1016/j.ejmech.2018.08.088
日期:2018.12
effective against the human colon adenocarcinoma cells with IC50 concentrations of 7.5–20 μM. In this series, the carbotetracyclic catechol 4e (IC50 = 7.5 μM) and quinone 12 (IC50 = 8 μM) were found to be the most potent compounds having the IC50 of less than 10 μM with no cytotoxic effect on the normal cells. Downregulation of Cox-2 and survivin and cell cycle arrest eventually leading to apoptosis were