Patent ID: 7060845

Claim:
A compound having the formula (I bis) wherein “n” is 1 or 2, “i” is a whole number varying from 2 to n+1, GP is selected from the group consisting of: an oxycarbonyl group ROCO, R representing an alkyl group of 1 to 20 carbon atoms, unsubstituted or substituted with an aryl group whose cyclic structure contains 5 to 20 carbon atoms, said alkyl group being saturated or not, an acyl group RCO, R being chosen from: an alkyl group of 1 to 20 carbon atoms or an aryl group whose cyclic structure contains 5 to 20 carbon atoms, said alkyl group being possibly substituted with an aryl group whose cyclic structure contains 5 to 20 carbon atoms, said alkyl group being saturated or not, GP along with R 1 and the N then are bonded to form a phthalimido group of formula: a biotinyle group having the following formula groups R 1 and R i can each represent independently from each other: a hydrogen, a halogen, the protected or unprotected side chain of an amino acid selected from natural and synthetic amino acids, a (C 1 –C 20 ) alkyl group, unsubstituted or substituted, an aryl group whose cyclic structure contains 5 to 20 carbon atoms, a group OR a , —NH 2 , —OH, —COOR a , —CONHR a , —CONH 2 , —CH 2 COOR a , —CH 2 CONHR a , —CH 2 CONH 2 , R a representing an alkyl group, saturated or not, having 1 to 20 carbon atoms, an aralkyl group having 1 to 20 carbon atoms, or an aryl group whose cyclic structure contains 5 to 20 carbon atoms, R 1 and R i groups can also form a cycle with N, said cycle being selected from the group consisting of X group represents a group having one of the following formula: wherein said compound is not one of the following compounds selected from the group consisting of: n=2, GP=Boc, R 1 =isobutyl, R 2 =R 3 =H, X=4-nitrophenol; n=2, GP=Boc, R 1 =benzyl, R 2 =R 3 =H, X=4-nitrophenol; n=2, GP=Boc, R 1 =CH 2 -p-C 6 H 4 Ot-Bu, R 2 =R 3 =H, X=4-nitrophenol; n=2, GP=Boc, R 1 =H, R 2 =R 3 =H, X=4-nitrophenol.