6-Butyryl-5-hydroxy-4-phenylseselin
نویسندگان
چکیده
IN THE TITLE COUMARIN COMPOUND (SYSTEMATIC NAME: 6-butyryl-5-hy-droxy-8,8-dimethyl-4-phenyl-2H,8H-benzo[1,2-b;3,4-b']dipyran-2-one), C(24)H(22)O(5), also known as mammea A/AC cyclo D, the chromene and pyran rings are almost coplanar with a maximum deviation from the mean plane of 0.295 (2) Å. The attached phenyl group is inclined at 53.49 (8)° with respect to the chromene ring. The mol-ecular structure is stabilized by an intra-molecular O-H⋯O hydrogen bond. In the crystal, mol-ecules are linked into sheets parallel to (101) by inter-molecular C-H⋯O hydrogen bonds. Adjacent sheets are sustained by inter-molecular C-H⋯π and π-π [centroid-centroid distance = 4.471 (2) Å] inter-actions.
منابع مشابه
6-Hydroxy-5-[(2-hydroxy-4,4-dimethyl-6-oxocyclohex-1-enyl)(4-nitrophenyl)methyl]-1,3-dimethylpyrimidine-2,4(1H,3H)-dione
In the title compound, C21H23N3O7, the pyrimidine-dione ring adopts a screw-boat conformation, whereas the cyclo-hexenone ring adopts an envelope conformation, with the C atom bearing the methyl groups as the flap atom. The dihedral angle between the mean planes of the pyrimidine-dione and cyclo-hexenone rings is 58.78 (2)°. The pyrimidine-dione and cyclo-hexenone rings form dihedral angles of ...
متن کاملPurification and role of phosphotransbutyrylase.
In recent years acyl phosphates have received much attention. For example, acetyl (1, 2), propionyl (3, 4), butyryl (5, 6), carbamyl (7, 8), and aspartyl (9) phosphates have been studied in detail. In fermentative bacteria the role of phosphotransacetylase, which facilitates an interconversion of acetyl phosphate and acetyl coenzyme A has been well documented (1,2,10-12). An enzyme capable of c...
متن کاملEthyl 6-(4-fluorophenyl)-4-hydroxy-2-sulfanylidene-4-trifluoromethyl-1,3-diazinane-5-carboxylate
In the title compound, C(14)H(14)F(4)N(2)O(3)S, the hexa-hydro-pyrimidine ring adopts a half-chair conformation. The mol-ecular conformation is stabilized by an intra-molecular O-H⋯O hydrogen bond, generating an S(6) ring. The crystal structure features O-H⋯S and N-H⋯S hydrogen bonds.
متن کامل(E)-4-Hydroxy-N′-(2-hydroxy-4-methoxybenzylidene)benzohydrazide
In the title compound, C(15)H(14)N(2)O(4), the dihedral angle between the benzene rings is 40.59 (4)° and an intra-molecular O-H⋯N hydrogen bond generates an S(6) ring. In the crystal, N-H⋯O, O-H⋯O and C-H⋯O inter-actions link the mol-ecules into a three-dimensional network.
متن کامل2,2′-[(3-Bromo-4-hydroxy-5-methoxyphenyl)methylidene]bis(3-hydroxy-5,5-dimethylcyclohex-2-en-1-one)
In the title compound, C(24)H(29)BrO(6), the dihedral angle between the cyclo-hexenone mean planes is 57.63 (2)° while the dihedral angles between the benzene ring and the cyclo-hexenone mean planes are 58.42 (2) and 69.08 (3)°. The two cyclo-hexenone rings both show an envelope conformation, with the C atom bearing two methyl groups as the flap atom in each ring. Two intra-molecular O-H⋯O hydr...
متن کامل