Design and synthesis of lamellarin D analogues targeting topoisomerase I.
A general synthetic route to rationally designed lamellarin D analogues, 1-dearyllamellarin D (1) and 1-substituted 1-dearyllamellarin D (2), has been developed. The key pentacyclic intermediate 22 was prepared by palladium-catalyzed direct arylation of 12, which in turn was synthesized via C-2-selective lithiation of 15 followed by palladium-catalyzed cross-coupling as the key reactions. Compound 22 was converted to a wide range of C-1-substituted analogues 2 via regioselective electrophilic substitution and palladium-catalyzed cross-coupling reactions.
Graduate School of Science and Technology, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
Takeshi
T
Ohta
Tsutomu
T
Fukuda
Fumito
F
Ishibashi
Masatomo
M
Iwao
D003374:Coumarins / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D015195:Drug Design; D006576:Heterocyclic Compounds, 4 or More Rings / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D007546:Isoquinolines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D013055:Spectrophotometry, Infrared; D013329:Structure-Activity Relationship; D059004:Topoisomerase I Inhibitors
D003374:Coumarins; D006576:Heterocyclic Compounds, 4 or More Rings; D007546:Isoquinolines; D059004:Topoisomerase I Inhibitors; C455554:lamellarin D