Chromogenic and fluorogenic substrates for .beta.-lactamase, methods for synthesis thereof and methods for detecting .beta.-lactamase in a sample are provided. The substrates are substantially colorless or substantially nonfluorescent .beta.-lactam compounds which include an electronegative leaving group. The leaving group comprises a carbamate, carbonate, thiocarbamate or thiocarbonate linkage and a fluorescent moiety or a moiety capable of producing a visually detectable colored product. Upon cleavage of the lactam ring by .beta.-lactamase, the leaving group is liberated and fluorescence or a colored product is produced.
本发明提供了用于β-内酰胺酶的色基和荧光基底,其合成方法以及检测样品中β-内酰胺酶的方法。这些基底是基本上无色或基本上非荧光的β-内酰胺化合物,包括一个电负离开基。该离开基包括一个
氨基甲酸酯、
碳酸酯、
硫氨酸酯或
硫代
碳酸酯链和一个荧光基团或产生可视检测的彩色产物的基团。通过β-内酰胺酶对内酰胺环的断裂,离开基被释放并产生荧光或彩色产物。