5-三氟甲基咪唑衍生物的质谱研究  

Mass Spectra of Some 1-substituted-5-Trifluoromethyl-imidazole-4-Phosphonates and-4-Carboxylates

作　　者：傅桂香[1] 黄卫生 亓伟年 袁承业[1] 

机构地区：[1]中国科学院上海有机化学研究所,上海200032

出　　处：《质谱学报》1997年第1期33-42,共10页Journal of Chinese Mass Spectrometry Society

摘　　要：本文报过一系列1-取代-5-三氯甲基咪唑-4-磷酸二乙酯和4-羧酸乙酯化合物的质谱，并利用高分辨质谱和亚稳跃迁技术研究其裂解机理。4-位为磷酸二乙酯的化合物，分子离子的裂解方式为：二乙基磷酸酯的断裂形成[M-C2H4]+、[M-C2H5]+、[M-OC2H4]+[M-C2H5]+和[M-C2H4]+等离子，另外从分子离子失去三氟甲基生成[M-CF2]+离子．有趣的是发生乙基和乙烯的重排，同时发生C-P键断裂，形成一系列重排离子。当个位为羧酸乙酯时，分子离子的裂解主要发生在羧酸酯的断裂。The mass spectra of sixteen 1-substituted 5-trinuoromethy-limidasole-4-phospho-nated (1～8) and-4-carboxylates (9～16) are reported. The fragmentation pathways have been studied usinghigh resotution mass spectrometry and metastable ions measure-ments. The spectra of compouns 1～8 exhibit molecular ion peaks of low intensity. For spectra of compounds 9 ～16 pronounced molecular ion peaks were observed. A rear-rangement involving C2H5 and C2H4 tranfer from oxygen atom to nitrogen and carbon atom of imidazole cycle for compounds 1～8 are described.

关 键 词：三氟甲基咪唑 质谱 亚稳跃迁 衍生物 

分 类 号：O626.23[理学—有机化学] O657.6[理学—化学]