Menthol reacts with phosphorus trichloride to afford menthyl phosphorodichloridite 2, which further reacts with racemic 1, 1-binaphthalene-2, 2-diol to give phosphite (+)-3 in the presence of triethylamine. (+)-3 can ...Menthol reacts with phosphorus trichloride to afford menthyl phosphorodichloridite 2, which further reacts with racemic 1, 1-binaphthalene-2, 2-diol to give phosphite (+)-3 in the presence of triethylamine. (+)-3 can be easily separated by fractional crystallization to form the crystal (+)-(S)-3 and the mother liquor (-)-(R)-3. Then both the crystal and the mother liquor are treated with AcOH-H2O to obtain enantiomeric pure (-)-(S)-1 and (+)-(R)-1 respectively, with enantiomeric excess up to 99.7%.展开更多
This paper provides a simple, convenient and mild condition method for -alkylation of g-butyrolactone. Three types of (E)-a-alkenyl-g-butyrolactone compounds were synthesized by condensation of corresponding aldehyd...This paper provides a simple, convenient and mild condition method for -alkylation of g-butyrolactone. Three types of (E)-a-alkenyl-g-butyrolactone compounds were synthesized by condensation of corresponding aldehydes and g-butyrolactone, using MeONa and EtONa as base. Then the a-alkyl-g-butyrolactones were gained by reducing the former alkenyl compounds through catalytic transfer hydrogenation under Pd/C catalyst with sodium hypophosphite at room temperature.展开更多
The crystal of the title compound, 3-(4′-Methoxyl)-phenyl-5-cyano-6-methylthio pyrimidine-2, 4-diones, ([C13H11N3O3S]2, Mr=578.62)，has been prepared and determined by X-ray diffraction. The crystal belongs to the mo...The crystal of the title compound, 3-(4′-Methoxyl)-phenyl-5-cyano-6-methylthio pyrimidine-2, 4-diones, ([C13H11N3O3S]2, Mr=578.62)，has been prepared and determined by X-ray diffraction. The crystal belongs to the monoclinic system, space group P21/n with parameters: a = 11.602(2), b = 15.921(3), c = 13.918(3)?, ( = 94.38(3)(, V = 2563(1) ?3, Z = 4, Dc = 1.499g/cm3, μ(MoK()= 2.64cm-1, F(000)=1200. R and Rw are 0.054 and 0.059, respectively, for 1692 observed unique reflections. The pyrimidione ring is six-membered plane, and the dihedral angle between the pyrimidione ring and benzene ring is 121.05(. From the above result, it could be predicted that the negative atoms among the title compound might interact with target D1 protein, and thus express its inhibitory activity.展开更多
基金Financial Support by the National Natural Science Foundation of China (No.29872016) the Hong Kong Polytechnic University ASD Fund are gratefully acknowledged.
文摘Menthol reacts with phosphorus trichloride to afford menthyl phosphorodichloridite 2, which further reacts with racemic 1, 1-binaphthalene-2, 2-diol to give phosphite (+)-3 in the presence of triethylamine. (+)-3 can be easily separated by fractional crystallization to form the crystal (+)-(S)-3 and the mother liquor (-)-(R)-3. Then both the crystal and the mother liquor are treated with AcOH-H2O to obtain enantiomeric pure (-)-(S)-1 and (+)-(R)-1 respectively, with enantiomeric excess up to 99.7%.
文摘This paper provides a simple, convenient and mild condition method for -alkylation of g-butyrolactone. Three types of (E)-a-alkenyl-g-butyrolactone compounds were synthesized by condensation of corresponding aldehydes and g-butyrolactone, using MeONa and EtONa as base. Then the a-alkyl-g-butyrolactones were gained by reducing the former alkenyl compounds through catalytic transfer hydrogenation under Pd/C catalyst with sodium hypophosphite at room temperature.
基金the National Natural Science Foundation of China (No. 29702006, 29832050), the Research Fund for the Doctoral Program of Higher
文摘The crystal of the title compound, 3-(4′-Methoxyl)-phenyl-5-cyano-6-methylthio pyrimidine-2, 4-diones, ([C13H11N3O3S]2, Mr=578.62)，has been prepared and determined by X-ray diffraction. The crystal belongs to the monoclinic system, space group P21/n with parameters: a = 11.602(2), b = 15.921(3), c = 13.918(3)?, ( = 94.38(3)(, V = 2563(1) ?3, Z = 4, Dc = 1.499g/cm3, μ(MoK()= 2.64cm-1, F(000)=1200. R and Rw are 0.054 and 0.059, respectively, for 1692 observed unique reflections. The pyrimidione ring is six-membered plane, and the dihedral angle between the pyrimidione ring and benzene ring is 121.05(. From the above result, it could be predicted that the negative atoms among the title compound might interact with target D1 protein, and thus express its inhibitory activity.
