Synthesis and in Vitro Antiprotozoal Activities of Dicationic 3,5-Diphenylisoxazoles
摘要:
3,5-Bis(4-amidinophenyl)isoxazole (3)an analogue of 2,5-bis(4-amidinophenyl)furan (furamidine) in which the central furan ring is replaced by isoxazoleand 42 novel analogues were prepared by two general synthetic pathways. The 43 isoxazole derivatives were assayed against Trypanosoma brucei rhodesiense (T. brucei rhodesiense) STIB900, Plasmodium falciparum (P. falciparum) K1, and rat myoblast L6 cells (for cytotoxicity) in vitro. Eleven compounds (3, 13, 16-18, 22, 26, 29, 31, 37, and 41) exhibited antitrypanosomal IC50 values less than 10 nM, five of which displayed cytotoxic indices (ratios of cytotoxic IC50 to antiprotozoal IC50 values) at least 10 times higher than that of furamidine. Eighteen compounds (4-8, 12, 14, 18-22, 25, 26, 28, 29, 32, and 43 were more active against P. falciparum than furamidine, with IC50 values less than 15 nM. Fourteen of these compounds had cytotoxic indices ranging between 10 and 120 times higher than that of furamidine, and five analogues exhibited high selectivity for P. falciparum over T. brucei rhodesiense.
Covalent Dimers of 1,3-Diphenylisobenzofuran for Singlet Fission: Synthesis and Electrochemistry
作者:Akin Akdag、Abdul Wahab、Pavel Beran、Lubomír Rulíšek、Paul I. Dron、Jiří Ludvík、Josef Michl
DOI:10.1021/jo502004r
日期:2015.1.2
The synthesis of covalent dimers in which two 1,3-diphenylisobenzofuran units are connected through one phenyl substituent on each is reported. In three of the dimers, the subunits are linked directly, and in three others, they are linked via an alkane chain. A seventh new compound in which two 1,3-diphenylisobenzofuran units share a phenyl substituent is also described. These materials are needed
Synthesis and antiprotozoal activity of dicationic 3,5-diphenylisoxazoles
申请人:THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL
公开号:EP1719767A1
公开(公告)日:2006-11-08
Novel dicationic 3,5-diphenylisoxazole compounds are described. Synthetic routes to these novel compounds are provided. Several of the compounds displayed in vitro activity versus Trypanosoma brucei brucei and Plasmodium falciparum comparable to that of furamidine. A majority of the novel compounds also were less toxic to VERO cells than furamidine.