Selective Hydrogenation of 4H-1-Benzopyran-4-one Derivatives with Group 8-10 Metal Catalysts.
نویسندگان
چکیده
منابع مشابه
3,5,7-Trimethoxy-2-(4-methoxyphenyl)-4H-1-benzopyran-4-one
In the title compound, C(19)H(18)O(6), also known as 3,4',5,7-tetra-methoxy-flavone, the dihedral angle between the benzopyran-4-one group and the attached benzene ring is 11.23 (8)°. An intra-molecular C-H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, mol-ecules are linked into a two-dimensional network parallel to (01) by inter-molecular C-H⋯O hydrogen bonds, which generate R(...
متن کامل2-(4-Bromophenyl)-6-methyl-4H-1-benzopyran-4-one (4′-bromo-6-methylflavone)
Planar (r.m.s. deviation from the plane through all non-H atoms = 0.036 Å) mol-ecules of the title compound, C(16)H(11)BrO(2), form a layered structure stabilized by C-H⋯O hydrogen bonds and π-π stacking inter-actions.
متن کامل5,7-Dimethoxy-2-(4-methoxyphenyl)-4H-1-benzopyran-4-one methanol solvate monohydrate
In the title compound (alternatively called 4',5,7-trimethoxy-flavone methanol solvate hydrate), C(18)H(16)O(5)·CH(3)OH·H(2)O, the flavone mol-ecule is almost planar, the inter-planar angle between the planes of the benzopyran-4-one group and the attached benzene ring being 4.69 (9)°. In the crystal, the flavone mol-ecule makes inter-molecular C-H⋯O hydrogen bonds to adjacent inversion-related ...
متن کامل2-(2,6-Dimethoxyphenyl)-5-hydroxy-7-methoxy-4H-1-benzopyran-4-one
In the title compound, C(18)H(16)O(6), the dimethoxy-phenyl ring is rotated by 61.8 (1)° from the plane of the benzopyran system. The mol-ecule is stabilized by an intra-molecular O-H⋯O hydrogen bond.
متن کاملSelective Hydrogenation With Copper Catalysts: II. Kinetics
To explain the unusually high selectivity of copper catalysts toward linolenate, model compounds were hydrogenated (150 C and atmospheric pressure) and the reaction products analyzed. Products varied depending upon location of the double bonds. Monoenes were not reduced by copper chromite except when the double bond was next to a carboxyl group. Dienes with isolated double bonds also were not r...
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ژورنال
عنوان ژورنال: NIPPON KAGAKU KAISHI
سال: 1993
ISSN: 2185-0925,0369-4577
DOI: 10.1246/nikkashi.1993.774