申请人:Bracco International B.V.
公开号:US05591846A1
公开(公告)日:1997-01-07
New nonionic radiographic contrast agents having the formula ##STR1## wherein Y is a single bond, ##STR2## R.sub.1, R.sub.1 ' and R.sub.2 are the same or different and are hydrogen, alkyl or hydroxyalkyl. Hydroxyalkyl refers to such alkyl groups having 1 or more hydroxy groups. Preferred hydroxyalkyl groups include: ##STR3## R.sub.3 and R.sub.4 are the same or different and are hydrogen, methyl or --CH.sub.2 CH.sub.2 OH; R.sub.5 is hydrogen, alkyl, --CH.sub.2 CH.sub.2 OH, CH.sub.2 OH or OH and R.sub.6 is alkyl, --CH.sub.2 CH.sub.2 OH, CH.sub.2 OH, OH or hydrogen and may be the same or different than R.sub.5 and m is zero or one, with the proviso that no methylene or methine carbon atom of the heterocyclic ring is attached to both a nitrogen and an oxygen atom with the additional proviso that when Y is a single bond, m is not zero. These new contrast agents are water soluble and have desirable low osmolality and anticoagulant properties.
新的非离子放射造影剂具有以下公式:##STR1## 其中Y是单键,##STR2## R.sub.1,R.sub.1'和R.sub.2相同或不同,可以是氢,烷基或羟基烷基。羟基烷基是指具有1个或多个羟基的烷基基团。首选的羟基烷基包括:##STR3## R.sub.3和R.sub.4相同或不同,可以是氢、甲基或--CH.sub.2 CH.sub.2 OH;R.sub.5是氢、烷基、--CH.sub.2 CH.sub.2 OH、CH.sub.2 OH或OH,R.sub.6是烷基、--CH.sub.2 CH.sub.2 OH、CH.sub.2 OH、OH或氢,可以与R.sub.5相同或不同,m为零或一,但异环戊二烯环上的甲基或亚甲基碳原子不连接氮和氧原子。此外,当Y为单键时,m不为零。这些新的造影剂具有良好的水溶性、低渗透压和抗凝血性能。