New 5-HT3 (Serotonin-3) Receptor Antagonists. III. An Efflcient Synthesis of Carbon 14-Labeled (+)-8,9-Dihydro-10-methyl-7-((5-methyl-lH-imidazol-4-yl)methyl)pyrido(1,2-a)indol-6(7H)-one Hydrochloride (FK 1052).
作者:Masayuki KATO、Shigetaka NISHINO、Kiyotaka ITO、Hisashi TAKASUGI
DOI:10.1248/cpb.43.1346
日期:——
H-imidazol-4-yl)methyl]pyrido[1,2- ]indol-6(7H)-one (8) with [14C]paraformaldehyde and dimethylamine hydrochloride gave the [14C]-10-dimethylaminomethyl compound (20). Subsequent hydrogenolysis of 20 with palladium on carbon and ammonium formate, followed by recrystallization of the salt with (+)-di-p-toluoyl-D-tartaric acid, gave [14C]FK 1052 with a radiochemical purity of 99.4% and an enantiomeric
(+)-8,9-二氢-10-甲基-7-[(5-甲基-1H-咪唑-4-基)甲基]吡啶基[1,2-a]吲哚-6(7H)-盐酸盐( FK 1052,1)是高效的5-HT3(5-羟色胺3)受体拮抗剂。为了研究FK 1052(1)的代谢和分布,我们从10-去甲基FK 1052(8)分三步合成了碳14标记的FK 1052。曼尼希反应和随后的二甲基氨基甲基的氢解使得能够在吡啶并[1,2-a]吲哚-6,(7H)-一个环的10位有效引入一个碳原子。(+)-8,9-二氢-7-[(5-甲基-1H-咪唑-4-基)甲基]吡啶基[1,2-]吲哚-6(7H)-1的曼尼希反应(8)用[14C]多聚甲醛和二甲胺盐酸盐制得[14C] -10-二甲基氨基甲基化合物(20)。随后用钯在碳和甲酸铵上氢解20