4-Nitrophenyl α-l-rhamnopyranoside hemihydrate1
نویسندگان
چکیده
The absolute configuration of the title compound, C(12)H(15)NO(7)·0.5H(2)O, was assigned from the synthesis. There are two rhamnoside mol-ecules and one water mol-ecule in the asymmetric unit, displaying O-H⋯O hydrogen bonding. One of the nitro groups does not conjugate efficiently with the benzene ring.
منابع مشابه
4-Nitrophenyl α-l-rhamnopyranoside hemihydrate
In the title compound, C(12)H(15)NO(7)·0.5H(2)O, there are two independent mol-ecules in the asymmetric unit, together with one water molecule. The pyran-oside rings each have close to a (1)C(4) chair conformation and the nitro groups are almost coplanar with the benzene rings. The water mol-ecule links the two independent mol-ecules through O-H⋯O hydrogen bonds. All the hydroxyl groups are inv...
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The title compound, C(40)H(31)NO(11)S·0.53CH(2)Cl(2)·0.38C(4)H(10)O, was synthesized in two steps from mannose penta-acetate and single crystals were grown by slow evaporation. The structure was determined by single-crystal X-ray diffraction, confirming the α-configuration of the anomeric thioaryl substituent. The asymmetric unit contains two crystallographically distinct mol-ecules of the carb...
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In the title compound, C(15)H(20)O(4)S, a dioxolane ring is fused to the pyran ring of the sugar which carries a thio-phenyl substituent on the anomeric C atom. The dioxolane ring adopts an envelope conformation and the pyran ring system a distorted (4)C(1) chair. The structure is stabilized by O-H⋯O hydrogen bonds, forming centrosymmetric dimers that generate an R(2) (2)(10) ring motif. Additi...
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