1-Hydroxy-3-(3-methylbut-2-enyloxy)xanthone
نویسندگان
چکیده
In the title compound, C(18)H(16)O(4), a monoprenylated xanthone, the xanthone skeleton exhibits an essentially planar conformation (r.m.s. deviation 0.0072 Å) and the isoprenyl side chain remains approximately in the mean plane of the xanthone unit, making a dihedral angle of 4.5 (2)°. The hydroxyl group forms an intra-molecular O-H⋯O hydrogen bond. Moreover, there is a weak inter-molecular C-H⋯O inter-action between a ring C atom and the xanthene O atom. In the crystal structure, there are no inter-molecular hydrogen bonds and the crystallographic packing is governed by van der Waals forces, leading to an arrangement in which the mol-ecules assemble with their planes parallel to each other, having a separation of 3.6 (3) Å.
منابع مشابه
3-[(E)-1-(Benzyloxyimino)ethyl]-7-(3-methylbut-2-enyloxy)-2H-chromen-2-one
In the title compound, C(23)H(23)NO(4), the dihedral angle beween the chromen-2-one ring system and the benzene ring is 69.73 (10)° and the mol-ecule adopts an E conformation with respect to the C=N double bond. In the crystal, inversion dimers linked by pairs of C-H⋯O hydrogen bonds occur, generating R(2) (2)(12) loops.
متن کاملMethyl 3-hydroxy-4-(3-methylbut-2-enyloxy)benzoate
The title compound, C(13)H(16)O(4), was isolated from culture extracts of the endophytic fungus Cephalosporium sp. The ester and ether substituents are twisted only slightly out of the benzene ring plane, making dihedral angles of 2.16 (2) and 3.63 (5)°, respectively. The non-H atoms of all three substituents are almost coplanar with the benzene ring, with an r.m.s. deviation of 0.0284 Å from t...
متن کامل3,5,3′-Trihydroxy-4′-methoxy-7-(3-methylbut-2-enyloxy)flavone
The title compound pteleifolosin C, C(21)H(20)O(7), was isolated from the petroleum ether-soluble fraction of an indigenous Chinese tree Melicope pteleifolia (Rutaceae). The dihedral angle between the benzene rings is 2.7 (2)°. Intra-molecular O-H⋯O hydrogen bonds occur. In the crystal, mol-ecules are linked by inter-molecular O-H-O hydrogen bonds.
متن کامل1,3,6-Trihydroxy-7-methoxy-2,8-bis(3-methylbut-2-enyl)-9H-xanthen-9-one
The title compound (trivial name α-mangostin), C(24)H(26)O(6), isolated from Cratoxylum glaucum, is characterized by a xanthone skeleton of three fused six-membered rings and two 3-methyl-but-2-enyl side chains. The three rings in the structure are nearly coplanar, with an r.m.s. deviation for the tricyclic ring system of 0.0014 Å. The two 3-methyl-but-2-enyl side chains are in (+)-synclinal an...
متن کامل2′-Carboxymethoxy-4,4′-bis(3-methylbut-2-enyloxy)chalcone
In the title compound, C(27)H(30)O(6), also known as sofalcone, an anti-ulcer agent used for the protection of gastric mucosa-, the two benzene rings form a dihedral angle of 6.78 (11)°. Inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers, which are further linked by weak C-H⋯O inter-actions into ribbons propagated in [2[Formula: see text]0]. Finally, π-π inter-...
متن کامل