Synthesis of C-14 and C-13, H-2-labeled IKK inhibitor: [14C] and [13C4,D3]-N-(6-chloro-7-methoxy-9H-pyrido[3,4-b]indol-8-yl)-2-methyl-3-pyridinecarboxamide
作者:Yuexian Li、Mihaela Plesescu、Shimoga R. Prakash
DOI:10.1002/jlcr.1093
日期:2006.8
[14C]-N-(6-Chloro-7-methoxy-9H-pyrido [3,4-b]indol-8-yl)-2-methyl-3-pyridinecarboxamide (5B), an IKK inhibitor, was synthesized from [14C]-barium carbonate in two steps in an overall radiochemical yield of 41%. The intermediate, [carboxyl-14C]-2-methylnicotinic acid, was prepared by the lithiation and carbonation of 3-bromo-2-methylpyridine. [13C4,D3]-N-(6-chloro-7-methoxy-9H-pyrido [3,4-b]indol-8
[14C]-N-(6-Chloro-7-methoxy-9H-pyrido [3,4-b]indol-8-yl)-2-methyl-3-pyridinecarboxamide (5B),一种 IKK 抑制剂,合成自[14C]-碳酸钡分两步进行,总放射化学产率为41%。中间体[羧基-14C]-2-甲基烟酸是通过3-溴-2-甲基吡啶的锂化和碳酸化制备的。[13C4,D3]-N-(6-氯-7-甲氧基-9H-吡啶并[3,4-b]吲哚-8-基)-2-甲基-3-吡啶甲酰胺(5C)由[1, 2,3,4-13C4]-乙酰乙酸乙酯和[D4]-甲醇分六步合成,总产率为2%。[13C4]-2-甲基烟酸是通过[13C4]-乙基3-氨基巴豆酸酯和丙烯醛缩合,然后用氢氧化锂水解制备的。版权所有 © 2006 John Wiley & Sons, Ltd.