Studies on 1,2,3,4-tetrahydroisoquinoline derivatives. I. Syntheses and .BETA.-adrenoceptor activities of positional isomers of trimetoquinol with respect to its 6,7-dihydroxyl groups.
作者:KOICHIRO YAMADA、MUNEYOSHI IKEZAKI、NORIHIDE UMINO、HISAO OHTSUKA、NOBUO ITOH、KATSUO IKEZAWA、AKIO KIYOMOTO、TAKEO IWAKUMA
DOI:10.1248/cpb.29.744
日期:——
In a series of phenylethanolamine β-stimulants, transformation of hydroxyl groups of the catechol type into those of the resorcinol type has been reported to improve the bioavailability. Therefore, five possible positional isomers (1-5) of trimetoquinol (TMQ) with respect to its 6, 7-dihydroxyl groups were synthesized and tested for bronchodilating activity. Among these positional isomers, the 5, 7-dihydroxyl derivative (4) exhibited more potent bronchodilating activity and longer duration of activity than (±)-TMQ and isoproterenol on intraduodenal administration.
在一系列苯乙醇胺β-激动剂中,据报道将儿茶酚型羟基转变为间苯二酚型羟基可以提高生物利用度。因此,合成了关于三甲氧喹啉(TMQ)的6,7-二羟基的五个可能的位异构体(1-5)并测试了其舒张支气管活性。在这些位异构体中,5,7-二羟基衍生物(4)在经十二指肠给药时表现出比(±)-TMQ和异丙肾上腺素更强的舒张支气管活性和更长的作用持续时间。