A novel nickel metal–organic framework with fluorite-like structure: gas adsorption properties and catalytic activity in Knoevenagel condensation
摘要:
一种新型的非穿插三维金属有机框架{[Ni4(μ6-MTB)2(μ2-H2O)4(H2O)4]·10DMF·11H2O}n(DMF=N,N'-二甲基甲酰胺)已经合成并表征。该框架由镍(II)离子作为连接器和甲烷四苯甲酸配体(MTB4-)作为连接件构建而成。单晶X射线衍射显示,该复合物表现出类似CaF2的萤石结构拓扑,并具有四种尺寸约为12.6×9.4Ų、9.4×8.0Ų、12.6×11.7Ų和14.9×14.9Ų的三维通道,这些通道中填充有客体分子。通过粉末X射线衍射、热重分析和红外光谱在原位加热过程中研究并优化了化合物的活化条件。氮气和二氧化碳吸附实验表明,活化样品的BET比表面积为700 m² g-1,在0°C时二氧化碳吸附量为12.36 wt%,这是MTB4-系列化合物中报道的最高值。该复合物在醛和活性亚甲基化合物的Knoevenagel缩合反应中进行了测试。确定了底物转化率与使用的醛大小的直接依赖关系。提出了MTB4-型金属有机框架上的Knoevenagel缩合反应的可能机制。
Novel pyridopyprimidinone derivatives which are HM74A agonists
申请人:Conte Aurelia
公开号:US20070275987A1
公开(公告)日:2007-11-29
The invention is concerned with novel pyridopyrimidinone derivatives of formula (I):
wherein R
1
to R
8
, X, Y, m and n are as defined in the description and in the claims. The compounds of the present invention are HM74A agonists with improved properties compared to niacin and can be used for the treatment and/or prevention of diseases such as dyslipidemia, atherosclerosis, diabetes, metabolic syndrome, and other related diseases associated with HM74A.