The invention relates to new propionamidine derivatives of formula (I) ##STR1## wherein X is halogen, and to a process for their preparation. According to the invention compounds of the formula (I) are prepared by reacting a 3-halopropionitrile of the formula (III) ##STR2## wherein X is as defined above, with sulfamide of the formula (II) ##STR3## in the presence of a hydrogen halide. Compounds of the formula (I) are useful intermediates in the preparation of famotidine.
本发明涉及通式(I)的新丙酰胺基衍
生物##STR1##其中X为卤素,以及它们的制备方法。根据本发明,通式(I)的化合物是通过使通式(III)的3-卤代
丙腈##STR2##其中X如上所定义,与通式(II)的
硫酰胺##STR3##在卤化氢的存在下反应来制备的。通式(I)的化合物是有用的法莫替丁制备中的中间体。