Publications scientifiques
Eric Robert Tiam
Dominique Serge Ngono Bikobo
Ibrahim Mbouombouo Ndassa
Norbert Mbabi Nyemeck
Auguste Abouem À Zintchem
Bruno Lenta Ndjakou
Dieudonné Emmanuel Pegnyemb
Lawrence Ayong
Patrick Hervé Diboue Betote
BMC Chemistry
Abstract Background Chemical and pharmacological investigations were performed on the stems of Cordia batesii (Boraginaeae); chemical studies included quantum calculations applied on a newly described compound. Results A new derivative of allantoin ( 1 ) named batesiin ( 2 ) was characterized. Thirteen other known compounds involving allantoin ( 1 ) were either isolated or identified. GC–MS enabled the identification of six compounds from a fraction containing essential oil. MeOH extract and some isolated compounds were tested in vitro against Pf 7G8 CQS and Pf Dd2 CQR strains of Plasmodium falciparum ; extract disclosed a moderate antiplasmodial activity (IC 50 = 50 μg mL −1 ). Meantime, the CH 2 Cl 2 extract and essential oil fraction were tested on a resistant mycobacterial strain of Mycobacterium tuberculosis ; a potent antimycobacterial activity with a MIC = 9.52 μg mL −1 was deduced from essential oil. Density functional theory (DFT) calculations were carried on batesiin ( 2 ). Calculated chemical shifts at B3LYP/6-31G(d,p) and MPW1PW91/6-31G+(d,p) showed much better correlations with the experimental data. Time dependent DFT at B3LYP/6-31G+(d,p) displayed a major absorption band 3.01 nm higher than the experimental value. Conclusion Cordia batesii can be considered as promising in search of compounds with antimalarial and antitubercular properties. DFT studies are very helpful when trying to learn more about the spectroscopic insights of a derivative of allantoin ( 1 ).
