在一系列咪唑并[1,2- a ]吡嗪衍生物上进行硝化。分析了不同取代的衍生物和所有取代位置的反应性,并将实验结果与13 nmr数据和半经验计算(AMI)进行了比较。尽管未取代的杂环对硝化具有很高的抵抗力,但供电子基团,例如8位上的烷氧基或烷基氨基,可增强咪唑并[1,2- a ]吡嗪衍生物对亲电取代,特别是硝化的反应性。在13-nmr实验,电子分布和以中性形式计算的分子静电势等密度面与实验结果非常吻合,表明位置3是硝化反应中最活泼的位置。
Synthesis and antibronchospastic activity of 8-alkoxy- and 8-(alkylamino)imidazo[1,2-a]pyrazines
摘要:
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.
Nitration was carried out on a series of imidazo[1,2-a]pyrazine derivatives. The reactivities of diversely substituted derivatives and of all positions of substitution were analysed and experimentalresults compared with 13-nmr data and semi empirical calculations (AMI). Although the unsubstituted heterocycle is highly resistant to nitration, electron-donating groups such as alkoxy or alkylamino on
在一系列咪唑并[1,2- a ]吡嗪衍生物上进行硝化。分析了不同取代的衍生物和所有取代位置的反应性,并将实验结果与13 nmr数据和半经验计算(AMI)进行了比较。尽管未取代的杂环对硝化具有很高的抵抗力,但供电子基团,例如8位上的烷氧基或烷基氨基,可增强咪唑并[1,2- a ]吡嗪衍生物对亲电取代,特别是硝化的反应性。在13-nmr实验,电子分布和以中性形式计算的分子静电势等密度面与实验结果非常吻合,表明位置3是硝化反应中最活泼的位置。
TREATMENTS OF B-CELL PROLIFERATIVE DISORDERS
申请人:Rickles Richard
公开号:US20090053168A1
公开(公告)日:2009-02-26
The invention provides compositions and methods for the treatment of B-cell proliferative disorders that employ an A2A receptor agonist or one or more PDE inhibitors. The methods and compositions may further include an antiproliferative compound.
COMBINATIONS FOR THE TREATMENT OF B-CELL PROLIFERATIVE DISORDERS
申请人:Rickles Richard
公开号:US20090047243A1
公开(公告)日:2009-02-19
The invention features compositions and methods employing combinations of an A2A receptor agonist and a PDE inhibitor for the treatment of a B-cell proliferative disorder, e.g., multiple myeloma.
Compositions, Methods, and Kits for Treating Influenza Viral Infections
申请人:Altmeyer Ralf
公开号:US20110201665A1
公开(公告)日:2011-08-18
The present invention provides compositions, methods, and kits for treating or preventing a viral infection (e.g., an infection caused by an influenza virus).
METHODS AND COMPOSITIONS FOR TREATMENT OF MUSCULAR DYSTROPHY
申请人:Whalen Anne
公开号:US20110224128A1
公开(公告)日:2011-09-15
The invention features methods, compositions, and kits useful for the treatment of muscular dystrophy, e.g., Duchenne muscular dystrophy, in a patient.