Tri- and tetracyclic compounds

Details Tri- and tetracyclic compounds Tri- and tetracyclic compounds

C - Chemistry, Metallurgy

07

K

C07K 7/08 (2006.01) A61K 38/04 (2006.01) A61K 38/08 (2006.01) A61K 38/10 (2006.01) C07D 265/38 (2006.01) C07D 279/22 (2006.01) C07D 285/00 (2006.01) C07D 311/82 (2006.01) C07D 413/06 (2006.01) C07D 417/06 (2006.01) C07D 498/06 (2006.01) C07D 513/06 (2006.01) C07K 1/00 (2006.01) C07K 5/04 (2006.01) C07K 5/083 (2006.01) C07K 5/10 (2006.01) C07K 5/103 (2006.01) C07K 7/06 (2006.01) C07K 14/75 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2101599

Abstract There are described compounds of formula Image I wherein X signifies a group of the formula Image or Image ; Y signifies oxygen or sulphur; R1 signifies hydrogen or lower alkoxy; R2 signifies protected amino, amino or a residue of the formula -NH-R7 (c); R3 signifies carboxyl, functionally modified carboxyl or a residue of the formula -CO-R8 (d); R4 signifies lower alkyl, aryl, aryl-lower alkyl, hydrogen or acyl; R5 and R6 each signify lower alkyl, aryl or aryl-lower alkyl; and R7 and R8 each individually or together signify a residue of an amino acid or a chain of up to 20 amino acid residues, whereby the amino acid residue or the amino acid residues can be protected and whereby the molecule contains in total a maximum of 20 amino acid residues, and salts thereof. Those compounds of formula I in which R2 signifies a residue of formula (c), R3 signifies a residue of formula (d) and R7 and R8 together signify a residue of an amino acid or a chain of up to 20 amino acid residues, especially those in which the amino acid residue or the chain of amino acid residues does not contain protecting group(s), are "research tools" in the determination of biologically active peptide sequences and also potentially suitable as medicaments. The remaining compounds of formula I are useful as intermediates.

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