Carbamate ester derivatives as potential prodrugs of the presynaptic dopamine autoreceptor agonist (-)-3-(3-hydroxyphenyl)-N-propylpiperidine
摘要:
Twenty derivatives bearing substituents on the phenolic function of (-)-3-(3-hydroxyphenyl)-N-propylpiperidine [(-)-3-PPP] were synthesized and tested as prodrugs. The carbamate ester derivatives were found to be the most suitable prodrugs, and especially the 4-isopropylphenylcarbamate 20 was capable of escaping the first-pass metabolism and still generating high plasma levels of the parent compound. Four hours after an oral dose of 100 mumol/kg to rats, a plasma level of 2400 nmol/L of (-)-3-PPP was detected by an HPLC method. This was 90 times the level reached after 4 h (27 nmol/L) when (-)-3-PPP itself was given orally at the same dose.
The synthesis of (5-acylaminomethyl-3-carbamoyl-1H-1,2,4-triazol-1-yl)benzophenonederivatives 4a-i, 14a-d, 15a-d, 16a-c, is described. Acylation of the key intermediate, 1-benzoylphenylazo-1-aminoacetamide 7, followed by cyclization in the presence of acid afforded 1H-1,2,4-triazole derivatives. These compounds were evaluated for their central nervous system (CNS) activity. Some of these compounds
描述了(5-酰基氨基甲基-3-氨基甲酰基-1 H -1,2,4-三唑-1-基)二苯甲酮衍生物4a-i,14a-d,15a-d,16a-c的合成。关键中间体1-苯甲酰基苯基偶氮-1-氨基乙酰胺7的酰化,然后在酸存在下环化,得到1 H -1,2,4-三唑衍生物。对这些化合物的中枢神经系统(CNS)活性进行了评估。当口服时,这些化合物中的一些在小鼠抗戊烯四唑和旋转脚架试验中表现出高活性。
HIRAI, KENTARO;SUGIMOTO, HIROHIKO;ISBIBA, TERUYUKI;FUJISHITA, TOSHIO;TSUK+, J. HETEROCYCL. CHEM., 1982, 19, N 6, 1363-1369