rac-Methyl 4-azido-3-hydroxy-3-(2-nitrophenyl)butanoate
نویسندگان
چکیده
In the title compound, C(11)H(12)N(4)O(5), the mean plane through the nitro substituent on the benzene ring is inclined to the benzene mean plane by 85.8 (2)°, which avoids steric inter-actions with the ortho substituents. The hydr-oxy group is involved in bifurcated hydrogen bonds. The first is an intra-molecular O-H⋯O hydrogen bond, involving the ester carbonyl O atom, which gives rise to the formation of a boat-like hydrogen-bonded chelate ring. The second is an inter-molecular O-H⋯N hydrogen bond involving the first N atom of the azide group of a symmetry-related mol-ecule. In the crystal structure this leads to the formation of a polmer chain extending in the c-axis direction.
منابع مشابه
3-Ethyl 5-methyl 2-hydroxy-6-methyl-4-(4-nitrophenyl)-2-trifluoromethyl-1,2,3,4-tetrahydropyridine-3,5-dicarboxylate
In the title compound, C(18)H(19)F(3)N(2)O(7), the tetrahydropyridine ring adopts a half-chair conformation. The nitro group is disordered over two sites with occupancies of 0.780 (15) and 0.220 (15). An intra-molecular N-H⋯F hydrogen bond is observed in the mol-ecular structure. The mol-ecules are linked into a two-dimensional network parallel to (100) by O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds.
متن کاملSynthetic explorations towards 3-deoxy-3-fluoro derivatives of D-perosamine.
Based on a literature precedent, preparation of methyl 4-azido-3,4,6-trideoxy-3-fluoro-alpha-D-mannopyranoside (18) was attempted via fluorination of methyl 4-azido-2-O-benzyl-4,6-dideoxy-alpha-D-altropyranoside with diethylaminosulfur trifluoride (DAST). Contrary to expectations, the reaction took place with retention of configuration at the site of the fluorination yielding methyl 4-azido-2-O...
متن کاملCyclic and acyclic products from the reactions between methyl 3-oxobutanoate and arylhydrazines.
The molecules of methyl 3-(2-nitrophenylhydrazono)butanoate, C(11)H(13)N(3)O(4), (I), and methyl 3-(2,4-dinitrophenylhydrazono)butanoate, C(11)H(12)N(4)O(6), (II), both prepared from methyl 3-oxobutanoate and the corresponding nitrophenylhydrazine, exhibit polarized molecular electronic structures; in each of (I) and (II), the molecules are linked into chains by a single C-H...O hydrogen bond. ...
متن کاملEthyl 6-[4-(dimethylamino)phenyl]-4-hydroxy-2-oxo-4-(trifluoromethyl)hexahydropyrimidine-5-carboxylate
The title compound, C(16)H(20)F(3)N(3)O(4), was prepared by reaction of 4-(dimethyl-amino)benzaldehyde, ethyl 4,4,4-trifluoro-3-oxo-butanoate and urea. In the title mol-ecule, the pyrimidine ring adopts a half-chair conformation and there is an intra-molecular hydrogen bond (O-H⋯O). The crystal structure is stabilized by two types inter-molecular hydrogen bonds (N-H⋯O and N-H⋯N).
متن کامل5-Benzoyl-4-hydroxy-6-(4-nitrophenyl)-4-trifluoromethyl-3,4,5,6-tetrahydropyrimidin-2(1H)-one monohydrate
The asymmetric unit of the title compound, C(18)H(14)F(3)N(3)O(5)·H(2)O, contains two independent formula units. The two heterocyclic mol-ecules differ in the orientations of the benzoyl-phenyl group with respect to the tetra-hydro-pyrimidine ring [C-C-C-C torsion angles of 64.5 (3) and 67.1 (3)°]. In both mol-ecules the pyrimidine ring adopts a half-chair conformation. The mol-ecules are linke...
متن کامل