| abstract |
The present invention provides a compound of the following formula (I): R3-NH-C(=X)-P(=O)OR1OR2 including pharmaceutically acceptable salts, solvates, hydrates and polymorphs of the compounds of formula I, as well as geometrical isomers and optically active forms of the compounds of formula I and pharmaceutically acceptable salts, solvates, hydrates and polymorphs of said isomers and forms, wherein R' and R2 may be the same or different and are each selected from hydrogen, acyloxyalkyl and aryl or R1 and R2 may form together with the oxygen and phosphorus atoms a dioxaphosphacycloalkane ring; X is 0 or S; and R3 is selected, when X is 0, from bicycloalkyl, cycloalkylalkyl and substituted cycloalkyl by at least one of alkyl, amino, amidino and guanidino; and R3 is selected, when X is S, from bicycloalkyl, cycloalkylalkyl and cycloalkyl optionally substituted by at least one of alkyl, amino, amidino and guanidino; with the proviso that when X is O, R3 is not cyclohexylmethyl, and when X is S, R3 is not cyclohexyl. The invention further provides pharmaceutical compositions comprising the above compounds and their use in medicine. |