Cross-Coupling Reaction of 2-halo1-methyl-1H-imidazo[4,5-b]pyridine Offers a New Synthetic Route to Mutagenic Heterocyclic Amine-PHIP and DMIP
作者:Ayyiliath M. Sajith、Arayambath Muralidharan、Ranjith P. Karuvalam、Karickal R. Haridas
DOI:10.5012/jkcs.2013.57.3.361
日期:2013.6.20
A modified synthetic approach to the synthesis of heterocyclic food mutagens, 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PHIP) and 2-amino-1,6-dimethylimidazo[4,5-b]pyridine (DMIP) is reported. This route highlights an optimized palladium catalysed Buchwald cross-coupling of 2-halo-1-methyl-imidazo[4,5-b]pyridine with benzophenoneimine followed by acidic hydrolysis to yield compound 7. Using finely tailored conditions, Suzuki cross-coupling reactions with highly efficient catalytic systems were performed as the final step on 8 to introduce the aryl group and methyl group on the heterocyclic core.
杂环食品诱变剂 2-氨基-1-甲基-6-苯基咪唑并[4,5-b]吡啶 (PHIP) 和 2-氨基-1,6-二甲基咪唑[4,5-b] 的改进合成方法] 吡啶 (DMIP) 已被报道。该路线重点介绍了 2-卤代-1-甲基-咪唑并[4,5-b]吡啶与二苯甲酮亚胺的优化钯催化 Buchwald 交叉偶联,然后进行酸水解,生成化合物 7。使用精心设计的条件,Suzuki 交叉偶联反应作为8的最后一步,使用高效催化系统在杂环核上引入芳基和甲基。