作者:Leo Štefan、Ana Čikoš、Robert Vianello、Ivica Đilović、Dubravka Matković-Čalogović、Miljenko Dumić
DOI:10.3390/molecules26227032
日期:——
(DCE) into 1,2-bis[(1-methyl-1H-imidazole-2-yl)thio]ethane (2), that we have described recently, opened the question about its formation pathway(s). Results of the synthetic, NMR spectroscopic, crystallographic and computational studies suggest that, under given conditions, 2 is obtained by direct attack of 1 on the chloroethyl derivative 2-[(chloroethyl)thio]-1-methyl-1H-imidazole (3), rather than through
甲巯咪唑 ( 1 ) 与 1,2-二氯乙烷 (DCE) 的自发S-烷基化成 1,2-双 [(1-甲基-1 H-咪唑-2-基) 硫] 乙烷 ( 2 ),我们已经描述过最近,打开了有关其形成途径的问题。合成、NMR 光谱、晶体学和计算研究的结果表明,在给定条件下,2是通过1直接攻击氯乙基衍生物 2-[(氯乙基)硫]-1-甲基-1 H-咪唑 ( 3 ),而不是通过分离出稳定的硫鎓离子异构体,即 7-甲基-2 H , 3 H , 7 H -imidazo[2,1-b ]噻唑-4-氯化鎓(4a,斜方晶系,空间群Pnma),或类似反应,通过假设但未经证实的中间体硫鎓离子5。此外,在与1的反应中,4a比N-氯乙基衍生物更倾向于异构化,1-氯乙基-2,3-二氢-3-甲基-1H-咪唑-2-硫酮(7),而不是烷基化为2,而7进一步与1反应形成3-甲基-1-[(1-甲基-咪唑-2-基)硫乙基]-1 H-咪唑-2-硫酮(