New Derivatives of 5-pentylamino-5-oxopentanoic and 4-pentylamino-4-oxo-butanoic acids with antagonistic activity towards cholecystokinin and a method for their preparation.

摘要

New original derivatives are described of 5-pentylamino -5-oxopentanoic and 4-pentylamino-4-oxobutanoic acids having the formula: <CHEM> in which n is 1 or 2, R1 is selected from the groups 2-naphthyl, 2 (or 3)-quinolinyl, 2 (or 3)-indolyl, 2 (or 3)-benzofuranyl, 2 (or 3)-benzothiophenyl, and R2 is a pentyl group or an alkoxyalkyl group with 4 or 5 carbon atoms, preferably pentyl, 2-ethoxyethyl, 3-methoxypropyl or 3-ethoxypropyl. The compounds have a powerful antagonistic activity towards cholecystokinin and are particularly useful in the treatment of illnesses of the digestive system, such as colitis, biliary diskinesia, pancreatitis or in the treatment of disorders of the central nervous system imputable to deficiencies in the physiological neuron levels of cholecystokinin or other related bioactive polypeptides.