Phosphone- and phosphonoalkyl-azacycloalk(en)yl carboxylic acid compounds

Abstract From the Canadian patent

21489-6938, 4-15361/+/CGC 1135, Phosphono- and phosphonoalkyl-azacycloal(en)yl carboxylic acid compounds Abstract of the Disclosure, The present invention is concerned with the compounds of formula I (I), wherein one or both of the acidic hydroxy groups of the phosphonic acid moiety may be etherified, lower alkyl, benzyl benzyl substituted on, phenyl by halogen lower alkyl or lower alkoxy; lower alkanoyloxymethyl or lower alkanoyloxymethyl substituted on oxymethyl by lower alkyl or cycloalkyl, m represents one or zero, R1 is carboxy carbamoyl or lower, alkoxycarbonyl, lower alkanoyloxymethoxycarbonyl di-lower alkylamino, straight chain C2-C4-alkoxycarbonyl or pyridylmethoxycarbonyl wherein, …