Efficient Synthesis of 3-Aminocyclobut-2-en-1-ones: Squaramide Surrogates as Potent VLA-4 Antagonists
摘要:
[GRAPHICS]A novel series of uniquely functionalized 3-aminocyclobut-2-en-1-ones has been prepared by facile condensation of a variety of cyclobuta-1,3-diones with a phenylalanine-derived primary amine. These systems subsequently lend themselves to substitution at C-2 by reaction with a variety of electrophilic reagents including N-halosuccinimides, sulfenyl chlorides, and Eschenmoser's salt. Compounds from this novel series are potent antagonists of VLA-4.
Efficient Synthesis of 3-Aminocyclobut-2-en-1-ones: Squaramide Surrogates as Potent VLA-4 Antagonists
摘要:
[GRAPHICS]A novel series of uniquely functionalized 3-aminocyclobut-2-en-1-ones has been prepared by facile condensation of a variety of cyclobuta-1,3-diones with a phenylalanine-derived primary amine. These systems subsequently lend themselves to substitution at C-2 by reaction with a variety of electrophilic reagents including N-halosuccinimides, sulfenyl chlorides, and Eschenmoser's salt. Compounds from this novel series are potent antagonists of VLA-4.
Phenylalanine enamide derivatives of formula (1) are described:
1
wherein
R
1
is a group Ar
1
L
2
Ar
2
Alk- in which:
Ar
1
is an optionally substituted aromatic or heteroaromatic group;
L
2
is a covalent bond or a linker atom or group;
Ar
2
is an optionally substituted arylene or heteroarylene group; and Alk is a chain —CH
2
—CH(R)13 , —CH═C(R)— or
2
in which
R is a carboxylic acid (—CO
2
H) or a derivative or biostere thereof;
X is an —O— or —S— atom or —N(R
2
)— group in which:
R
x
, R
y
and R
z
which may be the same or different is each a hydrogen atom or an optional substituent;
or R
z
is an atom or group as previously defined and R
x
and R
y
are joined together to form an optionally substituted spiro linked cycloaliphatic or heterocycloaliphatic group; and the salts, solvates, hydrates and N-oxides thereof.
The compounds are able to inhibit the binding of integrins to their ligands and are of use in the prophylaxis and treatment of immuno or inflammatory disorders or disorders involving the inappropriate growth or migration of cells.
Phenylalanine enamide derivatives of formula (1) are described:
wherein
R
1
is a group Ar
1
L
2
Ar
2
Alk- in which:
Ar
1
is an optionally substituted aromatic or heteroaromatic group;
L
2
is a covalent bond or a linker atom or group;
Ar
2
is an optionally substituted arylene or heteroarylene group;
and Alk is a chain
in which R is a carboxylic acid (—CO
2
H) or a derivative or biostere thereof;
X is an —O— or —S— atom or —N(R
2
)— group in which:
R
x
, R
y
and R
z
which may be the same or different is each a hydrogen atom or an optional substituent;
or R
z
is an atom or group as previously defined and R
x
and R
y
are joined together to form an optionally substituted spiro linked cycloaliphatic or heterocycloaliphatic group; and the salts, solvates, hydrates and N-oxides thereof. The compounds are able to inhibit the binding of integrins to their ligands and are of use in the prophylaxis and treatment of immuno or inflammatory disorders or disorders involving the inappropriate growth or migration of cells.
PHENYLALANINE ENAMIDE DERIVATIVES POSSESSING A CYCLOBUTENE GROUP, FOR USE AS INTEGRIN INHIBITORS
申请人:Celltech R & D Limited
公开号:EP1370531B1
公开(公告)日:2007-02-28
US7501437B2
申请人:——
公开号:US7501437B2
公开(公告)日:2009-03-10
Efficient Synthesis of 3-Aminocyclobut-2-en-1-ones: Squaramide Surrogates as Potent VLA-4 Antagonists
作者:Stephen Brand、Benjamin C. de Candole、Julien A. Brown
DOI:10.1021/ol034701n
日期:2003.6.1
[GRAPHICS]A novel series of uniquely functionalized 3-aminocyclobut-2-en-1-ones has been prepared by facile condensation of a variety of cyclobuta-1,3-diones with a phenylalanine-derived primary amine. These systems subsequently lend themselves to substitution at C-2 by reaction with a variety of electrophilic reagents including N-halosuccinimides, sulfenyl chlorides, and Eschenmoser's salt. Compounds from this novel series are potent antagonists of VLA-4.