PRODUCTION OF BENZENE DERIVATIVES
The present invention relates to the production of benzene derivatives from furfural and its derivatives. The present invention also relates to the preparation of novel intermediates derived from furfural and its derivatives. The present invention describes new routes for converting furfural and its derivatives into benzene derivatives including novel intermediates.
1 . A process for the preparation of a compound of Formula (I)
wherein
X and Y independently are optionally substituted heteroatoms;
R is a C 1-4 alkylene group which is optionally substituted with one or more R 1 ;
R 1 is a linear, branched and/or cyclic, saturated or unsaturated hydrocarbon group which optionally bears one or more functional groups;
R 2 independently is H, alkyl, alkenyl or aryl; and
R 3 and R 4 independently are H, —COR 2 or —CO 2 R 2 , provided that R 3 and R 4 are not identical; and
R 5 is R 2 , —CH 2 OR 2 , —COR 2 , —CO 2 R 2 or;
which comprises reacting a compound of Formula (II)
wherein X, Y, R, R 2 and R 5 are defined as above;
with a compound of Formula (III) or (III′)
wherein R 3 and R 4 are defined as above.
2 . The process according to claim 1 , wherein
X and Y are O or X and Y are S, and
R is —CH 2 —CH 2 —, —CH 2 —CH 2 —CH 2 —, —CH(CH 3 )—CH(CH 3 )—, —C(CH 3 ) 2 —C(CH 3 ) 2 — or —CH 2 —C(CH 3 ) 2 —CH 2 —.
3 . The process according to claim 1 , wherein R 2 and R 5 are H.
4 . The process according to claim 1 , wherein R 3 or R 4 is H.
5 . A process for the preparation of a compound of Formula (IV)
wherein
X is an optionally substituted heteroatom;
R 2 independently is H, alkyl, alkenyl or aryl;
R 3 and R 4 independently are H, —COR 2 or —CO 2 R 2 , provided that R 3 and R 4 are not identical;
R 5 is R 2 , —CH 2 OR 2 , —COR 2 , —CO 2 R 2 or
wherein Y is an optionally substituted heteroatom;
R is a C 1-4 alkylene group which is optionally substituted with one or more R 1 ; and
R 1 is a linear, branched and/or cyclic, saturated or unsaturated hydrocarbon group which optionally bears one or more functional groups;
a) which comprises dehydration/aromatization of a compound of Formula (I)
wherein X, Y, R, R 2 , R 3 , R 4 and R 5 are defined as above;
to obtain a compound of Formula (V)
wherein X, Y, R, R 2 , R 3 , R 4 and R 5 are defined as above;
followed by deprotection of the compound of Formula (V);
or
b) which comprises carrying out the dehydration/aromatization and the deprotection of the compound of Formula (I) in a single step.
6 . The process according to claim 5 , wherein:
X and Y are O or X and Y are S,
R is —CH 2 —CH 2 —, —CH 2 —CH 2 —CH 2 —, —CH(CH 3 )—CH(CH 3 )—, —C(CH 3 ) 2 —C(CH 3 ) 2 — or —CH 2 —C(CH 3 ) 2 —CH 2 —,
R 2 and R 5 are H, and
R 3 or R 4 is H.
7 . The process according to claim 5 , which further comprises preparing the compound of Formula (I) by the process as defined in claim 1 .
8 . A process for the preparation of a xylene derivative of Formula (VI)
wherein R 6 independently is H or —CH 2 —NH 2 , provided that at least one of R 6 is —CH 2 —NH 2 ;
which comprises:
preparing a compound of Formula (VII)
wherein R 7 independently is H, —COR 2 or —CO 2 R 2 , provided that both R 7 are not identical, and wherein R 2 independently is H, alkyl, alkenyl or aryl, and
proceeding with reductive amination of the compound of Formula (VII).
9 . A compound of Formula (I)
or of Formula (V)
wherein
X and Y independently are optionally substituted heteroatoms;
R is a C 1-4 alkylene group which may optionally be substituted with one or more R 1 ;
R 1 is a linear, branched and/or cyclic, saturated or unsaturated hydrocarbon group which optionally bears one or more functional groups;
R 2 independently is H, alkyl, alkenyl or aryl;
R 3 and R 4 independently are H, —COR 2 or —CO 2 R 2 , provided that R 3 and R 4 are not identical; and
R 5 is R 2 , —CH 2 OR 2 , —COR 2 , —CO 2 R 2 or;
with the exception of compounds of Formula (I) wherein R is —CH 2 —CH 2 —, R 2 and R 5 are H and R 3 and R 4 are —CO 2 R 2 wherein R 2 in one case is H and in the other case is methyl.
10 . The compound according to claim 9 , wherein X and Y are O or X and Y are S.
11 . The compound according to claim 9 , wherein R 2 and R 5 are H.
12 . The compound according to claim 9 , wherein R 3 or R 4 is H.
13 . A process for manufacturing a benzene derivative, the process comprising:
manufacturing the benzene derivative from a compound of Formula (II)
wherein
X and Y independently are optionally substituted heteroatoms;
R is a C 1-4 alkylene group which is optionally substituted with one or more R 1 ;
R 1 is a linear, branched and/or cyclic, saturated or unsaturated C 1-23 hydrocarbon group which optionally bears one or more functional groups;
R 2 independently is H, alkyl, alkenyl or aryl;
R 3 and R 4 independently are H, —COR 2 or —CO 2 R 2 , provided that R 3 and R 4 are not identical; and
R 5 is R 2 , —CH 2 OR 2 , —COR 2 , —CO 2 R 2 or
14 . A process for manufacturing a benzene derivative, the method comprising manufacturing the benzene derivative from the compound of claim 9 .
15 . The process according to claim 13 , wherein the benzene derivative is selected from the group consisting of ortho-phthalaldehyde, isophthalaldehyde, ortho-xylenediamine, meta-xylenediamine, 1,2,3-tri(aminomethyl)benzene, ortho-phthalic acid, isophthalic acid, trimellitic acid, 1,2,4-benzenetricarbaldehyde, 2-carb aldehydebenzoic acid, 3-carbaldehydeisophthalic acid, 2,3-dicarbaldehydebenzoic acid and combinations thereof.