Hydrazinonaphthalene and Azonaphthalene Thrombopoietin Mimics Are Nonpeptidyl Promoters of Megakaryocytopoiesis
摘要:
High-throughput screening for the induction of a luciferase reporter gene in a thrombopoietin (TPO)-responsive cell line resulted in the identification of 4-diazo-3-hydroxy-1-naphthalene-sulfonic acids as TPO mimics. Modification of the core structure and adjustment of unwanted functionality resulted in the development of (5-oxo-1,5-dihydropyrazol-4-ylidene)hydrazines which exhibited efficacies equivalent to those of TPO in several cell-based assays designed to measure thrombopoietic activity. Furthermore, these compounds elicited biochemical responses in TPO-receptor-expressing cells similar to those in TPO itself, including kinase activation and protein phosphorylation. Potencies for the best compounds were high for such low molecular weight compounds (MW < 500) with EC50 values in the region of 1-20 nM.
126.—Preparation of 4-halogeno-2-naphthols and 4-nitro-2-naphthol, with a note on the resonance structure of the internal diazo-oxides (diazo-naphthols)
作者:Herbert H. Hodgson、Stanley Birtwell
DOI:10.1039/jr9430000468
日期:——
87. Preparation of diazo-naphthols and nitration of 4-bromoaceto-1-naphthalide