Phthalimide compounds and methods of producing same

摘要

The present invention relates to phthalimide compounds represented by the following general formula (I) and their acid-added salts and to methods of producing the same: <IMAGE> (I) wherein Y represents -CH2-CH2- or -CH=CH-. The present invention provides phthalimide compounds represented by the above general formula (I) and their acid-added salts, which are useful compounds as intermediates of medicines such as anti-ulcers based on histamine H2 receptor antagonism. In particular, acid-added salts of the phthalimide compounds can be easily refined by the recrystallization method. Therefore, there is provided an advantage that purity of the anti-ulcers which are derived from phthalimide compounds and their acid-added salts according to the present invention can be improved.