[[.omega.-(Heterocyclylamino)alkoxy]benzyl]-2,4-thiazolidinediones as potent antihyperglycemic agents
摘要:
A series of [(ureidoethoxy)benzyl]-2,4-thiazolidinediones and [[(heterocyclylamino)alkoxy]-benzyl]-2,4-thiazolidinediones was synthesized from the corresponding aldehydes. Compounds from the urea series, exemplified by 16, showed antihyperglycemic potency comparable with known agents of the type such as pioglitazone and troglitazone (CS-045). The benzoxazole 49, a cyclic analogue of 16, was a very potent enhancer of insulin sensitivity, and by modification of the aromatic heterocycle, an aminopyridine, 37, was identified as a lead compound from SAR studies. Evaluation of antihyperglycemic activity together with effects on blood hemoglobin content, to determine the therapeutic index, was performed in 8-day repeat administration studies in genetically obese C57 Bl/6 ob/ob mice. From these studies, BRL 49653 (37) has been selected, on the basis of antihyperglycemic potency combined with enhanced selectivity against reductions in blood hemoglobin content, for further evaluation.
Synthesis and evaluation in vitro of 1-[2-(10-dihydroartemisininoxy) ethyl]-3-phenylurea derivatives as potential agents against cancer
摘要:
In order to develop potent and selective anticancer agents, a series of novel artemisinin derivatives bearing urea moiety 1a-n were facilely synthesized herein and screened for their activities in vitro against ten human tumor cell lines (HeLa, MCF-7, U937, K562, HL60, HCT116, HepG2, A549, A375-S2, and HT1080). The pharmacological results indicated that some compounds showed excellent activity against cancer cell lines and good selectivity, especially the compound 1c which proved to be the most active against the cancer cells as well as distinctive patterns of selectivity.
A Convenient Method of Synthesis of Unsymmetrical Urea Derivatives
作者:Grażyna Groszek
DOI:10.1021/op020055g
日期:2002.11.1
A method for the preparation of unsymmetrical urea derivatives that may contain functional groups such as hydroxyl, amine, amide, and carboxyl is described. The method consists of a one-pot modified Curtiusrearrangement starting with appropriate aromatic acid chloride and carried out in a nonaqueous system
Investigation of the Mitsunobu Reaction of<i>N</i>-(2-Hydroxyethyl)-<i>N′</i>-Phenyl-Ureas
作者:Taek Hyeon Kim、Gue-Jae Lee、Mi-Hyun Cha
DOI:10.1080/00397919908086441
日期:1999.8
The Mitsunobu reaction of N-(2-hydroxyethyl)-ureas 1 using PPh3 and EtO2CN=NCO2Et led to the mixture of N- and O-alkylation products or a single isomer depending on the substrates.