8-alkylaminoimidazo(1,2-a)pyrazines and derivatives, their preparation
申请人:l'Universite de Montpellier I
公开号:US05028605A1
公开(公告)日:1991-07-02
##STR1## Novel 8-alkylamino-imidazo(1,2-a)pyrazines of formula (I) show advantages pharmacological activities. They can be used for medical products in human and veterinary therapy in the field of applications of antispasmodics, uterine relaxants, bronchodilators, cardiac analeptics and neurosedatives.
The present invention provides compounds of Formula (I) as described herein, and salts thereof, and therapeutic uses of these compounds for treatment of disorders associated with Raf kinase activity. The invention further provides pharmaceutical compositions comprising these compounds, and compositions comprising these compounds and a therapeutic co-agent.
The present invention provides compounds of Formula (I) as described herein, and salts thereof, and therapeutic uses of these compounds for treatment of disorders associated with Raf kinase activity. The invention further provides pharmaceutical compositions comprising these compounds, and compositions comprising these compounds and a therapeutic co-agent.
Synthesis and antibronchospastic activity of 8-alkoxy- and 8-(alkylamino)imidazo[1,2-a]pyrazines
作者:Pierre A. Bonnet、Alain Michel、Florence Laurent、Claire Sablayrolles、Eliane Rechencq、Jean C. Mani、Maurice Boucard、Jean P. Chapat
DOI:10.1021/jm00096a008
日期:1992.9
Theophylline still occupies a dominant place in asthma therapy. Unfortunatly its adverse central nervous system (CNS) stimulant effects can dramatically limit its use, and adjustments in the dosage are often needed. We have synthesized a new series of imidazo[1,2-a]pyrazine derivatives which are much more potent bronchodilators than theophylline in vivo and do not exhibit the CNS stimulatory profile. In vitro studies on isolated rat uterus and guinea pig trachea confirm the high potentialities of these derivatives. 6-Bromo-8-(methylamino)imidazo[1,2-a]pyrazine-3-carbonitrile (23) is identified as the most potent compound of the series. As in the case of theophylline, phosphodiesterase inhibition appears unlikely to be the unique mechanism of action of this series of heterocycles.