Aminopyrazoles with high affinity for the human neuropeptide Y5 receptor
摘要:
1,3-Disubstituted-5-aminopyrazoles were prepared based on a lead compound found through high-throughput screening of our corporate compound library in an assay measuring affinity for the human neuropeptide Y5 receptor. The target compounds were prepared by cyclization of alpha -cyanoketones with appropriate hydrazines, followed by reduction and coupling to various sulfonamido-carboxylic acids. Several of these arylpyrazoles (e.g., 19 and 45) displayed high affinity for the human NPY Y5 receptor (< 20 nM IC(50)s). (C) 2001 Elsevier Science Ltd. All rights reserved.
Synthesis of Pyrazoles from 1,3-Diols via Hydrogen Transfer Catalysis
作者:Daniel C. Schmitt、Alexandria P. Taylor、Andrew C. Flick、Robert E. Kyne
DOI:10.1021/acs.orglett.5b00266
日期:2015.3.20
1,3-Diols engage in ruthenium-catalyzed hydrogen transfer in the presence of alkyl hydrazines to provide 1,4-disubstituted pyrazoles. Regioselective synthesis of unsymmetrical pyrazoles from beta-hydroxy ketones is also described.