Synthetic 1,4-disubstituted 1,4-dihydro-5H-tetrazol-5-one derivatives of fentanyl: Alfentanil (R 39209), a potent, extremely short-acting narcotic analgesic
作者:Frans Janssens、Joseph Torremans、Paul A. J. Janssen
DOI:10.1021/jm00161a027
日期:1986.11
times more potent than pethidine 15 and 72 times more potent than morphine 14. Alftentanil reaches its peak effect within 1 min after injection, and its duration of action is very short; at 2 times its MED50, 9r has a duration of action of 11 min. This duration is 30 min for 10 and 90 min for 14. Compared to 10, alfentanil 9r is about 4 times faster but 3 times shorter acting. Structurally, 9r shows
描述了芬太尼,芬太尼和舒芬太尼的一系列N-1,4-二取代-1,4-二氢-5H-四唑-5-一个哌啶基衍生物的合成。1-取代的四唑啉酮2基本上是通过叠氮化铝与四氢呋喃中的异氰酸酯或酰氯的加成反应制备的。在中性或弱碱性条件下2的烷基化几乎只能得到1,4-二取代的四唑啉酮异构体3。哌啶衍生物4与3在二甲基甲酰胺中的N-烷基化反应得到9a-v。静脉内注射化合物后,在大鼠尾缩反射试验中评估了大鼠的吗啡活性。芬太尼类似物9a-c(R4 = H)在2.5或10 mg / kg的测定剂量下无活性(iv)。对于甲芬太尼类似物(R4 = COOCH3),当R1代表低级烷基(9d-f)或噻吩基乙基(9n)时,具有最大的麻醉活性。舒芬太尼类似物(R4 = CH2OCH3)显示出与卡芬太尼衍生物(R4 = COOCH3)相同的结构-活性关系(SAR)谱。最佳活动的结构要求与10-12系列中的早期观察结果非常一致。从该