New compounds, 4-hydroxyisothiazoles, have been prepared by the reaction of α-amino ketones with thionylchloride or sulfur monochloride, which is a novel procedure for cyclization to an isothiazole ring. Polar solvents, especially dimethylformamide (DMF), were preferable for this cyclization. The reaction hardly proceeded in a nonpolar solvent such as benzene, but was accelerated by an addition of
The synthesis and evaluation of a series of 2,4-diaminopyridine-based neuropeptide Y Y1 ( NPY Y1) receptor antagonists are described. Compound 1 was previously reported by our laboratory to be a potent and selective Y1 antagonist; however, 1 was also found to have potent hERG inhibitory activity. The main focus of this communication is structure-activity relationship development aimed at eliminating the hERG activity of 1. This resulted in the identification of compound 3d as a potent and selective NPY Y1 antagonist with reduced hERG liability. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis and evaluation of substituted 4-alkoxy-2-aminopyridines as novel neuropeptide Y1 receptor antagonists
A series of substituted 4-alkoxy-2-aminopyridines 2, which were formally derived from neuropeptide Y1 antagonist 1 by replacing the morpholino portion with alkoxy groups, were synthesized and evaluated as neuropeptide Y Y1 receptor antagonists. Primary structure-activity relationships and identification of potent 4-alkoxy derivatives are described. (C) 2004 Elsevier Ltd. All rights reserved.
Piloty; Wilke, Chemische Berichte, 1912, vol. 45, p. 2587
作者:Piloty、Wilke
DOI:——
日期:——
JAWORSKI, T.;MIZERSKI, T.;MAZUR, K., POL. J. CHEM., 1981, 55, N 2, 321-325