Inhibitors of cyclic AMP phosphodiesterase. 4. Synthesis and evaluation of potential prodrugs of lixazinone (N-cyclohexyl-N-methyl-4-[(1,2,3,5-tetrahydro-2-oxoimidazo[2,1-b]quinazolin-7-yl)oxy]butyramide, RS-82856)
作者:Michael C. Venuti、Robert Alvarez、John J. Bruno、Arthur M. Strosberg、Leo Gu、Hi Shi Chiang、Ian J. Massey、Nancy Chu、John H. Fried
DOI:10.1021/jm00119a015
日期:1988.11
The cyclic AMP phosphodiesterase (cAMP PDE) inhibitor and cardiotonic agent lixazinone (N-cyclohexyl-N-methyl-4-[(1,2,3,5-tetrahydro-2- oxoimidazo[2,1-b]quinazolin-7-yl)oxy]butyramide, RS-82856, 1) and its acid and base addition salts were found to be insufficiently soluble in formulations suitable for intravenous administration. These results prompted an investigation into potential prodrugs with
环状AMP磷酸二酯酶(cAMP PDE)抑制剂和强心药lixazinone(N-环己基-N-甲基-4-[(1,2,3,5-四氢-2-氧代咪唑[2,1-b]喹唑啉-7-发现)))氧基]丁酰胺,RS-82856,1)及其酸和碱加成盐在适用于静脉内给药的制剂中溶解性不足。这些结果促使人们对具有提高的水溶性的潜在前药进行了研究,旨在通过三种不同的机制释放1:(1)α-羧酰胺的脱羧;(2)可溶的N-1-(酰氧基)甲基或(N,N-二烷基氨基)甲基部分的水解损失;或(3)胍基酯或酰胺的分子内封闭。通过三个标准对目标化合物作为1的传输系统进行了评估:(1)在生理条件下化学转化率为1;(2)在固定时间点抑制IV型cAMP PDE;(3)通过静脉内和口服给予的麻醉犬体内的变力活性。发现从4a(系列1)释放1太慢,以至于不能作为1的前药使用,因为脱羧只能由强酸诱导,而在强酸条件下发现水解开环剧烈竞争。相反,尽管