Structure−Activity Relationships of N-Hydroxyurea 5-Lipoxygenase Inhibitors
摘要:
The discovery of second generation N-hydroxyurea 5-lipoxygenase inhibitors was accomplished through the development of a broad structure-activity relationship (SAR) study. This study identified requirements for improving potency and also extending duration by limiting metabolism. Potency could be maintained by the incorporation of heterocyclic templates substituted with selected lipophilic substituents. Duration of inhibition after oral administration was optimized by identification of structural features in the proximity of the N-hydroxyurea which correlated to low in vitro glucuronidation rates. Furthermore, the rate of in vitro glucuronidation was shown to be stereoselective for certain analogs. (R)-N-[3-[5-(4-Fluorophenoxy)-2-furyl]-1-methyl-2-propynyl]-N-hy- droxyurea (17c) was identified and selected for clinical development.
Synthesis, chemical, and biological properties of vinylogous hydroxamic acids: dual inhibitors of 5-lipoxygenase and IL-1 biosynthesis
作者:Stephen W. Wright、Richard R. Harris、Janet S. Kerr、Alicia M. Green、Donald J. Pinto、Elaine M. Bruin、Robert J. Collins、Roberta L. Dorow、Lisa R. Mantegna
DOI:10.1021/jm00100a011
日期:1992.10
of each being dependent upon the structure of the VHA, solvent, and pH. VHAs undergo some of the typical reactions of hydroxamic acids as well as those of vinylogous amides. VHAs are active as inhibitors of 5-lipoxygenase and of IL-1 biosynthesis in vitro, which do not inhibit other enzymes of the arachidonic acid cascade. They have been shown by ESR studies to bring about inhibition of soybean type
Compound represented by formula (1) or a pharmaceutically acceptable solvate thereof, useful for treating or preventing Paget's disease of bone, hypercalcaemia, osteoporosis or asthma. (1) R
1
represents a C
1
-C
6
alkyl group or C
7
-C
15
aralkyl group (the aromatic ring of which can be substituted by a C
1
-C
6
alkyl group, C
1
-C
6
alkoxy group, a hydroxyl group, a halogenatom or a trifluoromethyl group), R
2
represents a C
1
-C
6
alkyl group, and R
3
represents a C
1
-C
6
alkyl or alkoxy group, which can be substituted with a hydroxyl group.
Synthesis of <i>N</i>-alkoxy amines and hydroxylamines <i>via</i> the iridium-catalyzed transfer hydrogenation of oximes
作者:Yanping Xia、Sen Wang、Rui Miao、Jianhua Liao、Lu Ouyang、Renshi Luo
DOI:10.1039/d2ob01084d
日期:——
hydrogenation of oximes to access N-alkoxy amines and hydroxylamines, and the reaction was accelerated by trifluoroacetic acid. The practical application of this protocol was demonstrated by a gram-scale transformation and two-step synthesis of the fungicide furmecyclox (BAS 389F) in overall yields of 92 and 85%, respectively. An asymmetric protocol using chiral Ir complexes to afford chiral N-alkoxy amines was
Compound represented by formula (1) or a pharmaceutically acceptable solvate thereof, usefull for treating or preventing Paget's disease of bone, hypercalcmia, osteoporosis or asthma. (1) R1 represents a C1-C6alkyl group or C7-C15 aralkyl group (the aromatic ring of which can be substituted by a C1-C8 alkyl group, C1-C6 alkoxy group, a hydroxyl group, a halogenatom or a trifluoromethyl group), R2 represents a C1-C6 alkyl group, and R3 represents a C1-C6 alkyl or alkoxy group, which can be substituted with a hydroxyl group.