To obtain a pharmaceutical preparation, containing a carbamoylmethylurea derivative having a strong affinity for a gastrin receptor and/or a central cholecystokinin receptor and useful as a therapeutic agent for gastric or duodenal ulcer, etc.
This pharmaceutical preparation comprises a compound of formula I (R1 is H or a lower alkyl; R2 is a lower alkoxy, a lower alkylamino, etc.; R3 is phenyl; R4 is phenyl, a cycloalkyl, an alkyl or a heterocyclic ring) or its pharmaceutically permissible salt. e.g. 2-[(tert- butoxycarbonylmethyl)-[3-(m-(carboxyphenyl) ureidomethylcarbonyl]]aminobenzophenone. The compound of formula I is obtained by reacting a compound of formula II (R9 is H or a carboxy-protecting group) with carbonyldiimidazole, reacting the resultant product with a compound of formula III (R10 is the same as R9) and using the prepared urea type compound of formula IV and a 2-substituted aniline derivative as starting raw materials.
NAGAI MASAHIKO
YORIFUJI TADAHIKO
SAKATA TERUO
