The application relates to substituted 4-phenylpiperidines of the general formula and their salts, preferably their pharmaceutically acceptable salts, in which R
2
, R
3
, W and X have the meanings explained in the description, a process for their preparation and the use of these compounds as medicines, especially as renin inhibitors.
Described are compounds of the general formula (I)
and pharmaceutically acceptable salt thereof, in which R2, R3, W,and X have the definitions illustrated in detail in the description, as beta-secretase, cathepsin D, plasmepsin II and/or HIV protease inhibitors.