Process for the preparation of n-alkylated dipeptides and...

Details Process for the preparation of n-alkylated dipeptides and... Process for the preparation of n-alkylated dipeptides and...

C - Chemistry, Metallurgy

07

K

260/284, 260/317

C07K 5/06 (2006.01) C07K 5/02 (2006.01)

Patent

CA 1258148

Abstract of the disclosure: The invention relates to a process for the pre- paration of compounds of the formula I Image (I) in which n is 1 or 2, R represents hydrogen, an aliphatic, cycloaliphatic, aromatic, araliphatic, cycloaliphatic- aliphatic radical or a radical ORa or SRa, in which Ra denotes alkyl, aryl or heteroaryl, R1 denotes hydrogen, an aliphatic, cycloaliphatic-aliphatic, aromatic, arali- phatic, heteroaromatic radical or an aminoacid side chain, R2 and R3 are identical or different and denote hydrogen, an aliphatic, cycloaliphatic, aromatic or araliphatic radical, and R4 + R5, together with the atoms carry- ing them, form a heterocyclic ring system, which comprises reacting trifluoromethanesulfonic acid derivatives of the formulae II or III with aminoacid esters of the formulae IV or V respectively. The invention also relates to com- pounds of the formula III and a process for their pre- paration.

453067

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