O-[4-(4-Pyridyl)butyl]-N-butylsulphonyl-(L)-tyrosine, process for preparing it and its use for preparing corresponding O-[4-(4-piperidinyl)butyl] derivatives

摘要

The invention relates to O-[4-(4-pyridyl)butyl]-N- butylsulphonyl-(L)-tyrosine of the formula I' ; to a process for preparing a compound of the formula I by means of selectively hydrogenating a compound of the formula I', and to a process for preparing a compound of the formula I'.