Antimalarial and Antiplasmodial Activities of Norneolignans. Syntheses and SAR
摘要:
A systematic change of the substituents and side chain of the norneolignan hinokiresinol afforded a 10 fold improvement of the IC50 value toward inhibition of the growth of Plasmodium falciparum. The more potent compounds controlled the parasiterma in mice infected with Plasinodium berghei.
The unexpected formation of a lithium-enolate from bis2-[(dimethylamino)methyl]phenyl copper lithium. X-ray structure of Li4[OC(CH2)C6H4CH2NMe2-2]4
作者:Johann T.B.H. Jastrzebski、Gerard Van Koten、Martin J.N. Christophersen、Casper H. Stam
DOI:10.1016/0022-328x(85)80217-5
日期:1985.9
Attempted crystallization of the bis(aryl)lithiumcuprate, Cu2Li2(C6H4CH2-NMe2-2)4, from diethyl ether/pentane afforded in according to an X-ray diffraction analysis appeared to be the lithium enolate, Li4[OC(=CH2)C6H4CH2NMe2-2]4. This consists of a central Li4O4 cube with intramolecular LiN coordination of the CH2NMe2 substituent. This enolate, which has also been prepared via an independent route
尝试根据X射线衍射分析从提供的乙醚/戊烷中结晶出双(芳基)锂铜酸铜Cu 2 Li 2(C 6 H 4 CH 2 -NMe 2 -2)4。烯醇盐Li 4 [OC(= CH 2)C 6 H 4 CH 2 NMe 2 -2] 4。它由具有分子内Li 4N配位的CH 2 NMe 2的中心Li 4 O 4立方体组成取代基。该烯醇化物也已经通过独立的途径制备,是结构特征化的烯醇锂的第一个实例,并且包含分子内配位的Li中心。
Cationic Chalcone Antibiotics. Design, Synthesis, and Mechanism of Action
作者:Simon F. Nielsen、Mogens Larsen、Thomas Boesen、Kristian Schønning、Hasse Kromann
DOI:10.1021/jm049424k
日期:2005.4.1
This paper describes how the introduction of "cationic" aliphatic amino groups in the chalcone scaffold results in potent antibacterial compounds. It is shown that the most favorable position for the aliphatic amino group is the 2-position of the B-ring, in particular in combination with a lipophilic substituent in the 5-position of the beta-ring. We demonstrate that the compounds act by unselective disruption of cell membranes. Introduction of an additional aliphatic amino group in the A-ring results in compounds that are selective for bacterial membranes combined with a high antibacterial activity against both Gram-positive and -negative pathogens. The most potent compound in this study (78) has an MIC value of 2 mu M against methicillin resistant Staphylococus aureus.