The title compound 2-[(4-methoxy-6-methylthio-2-pyrimidinyl)aminocarbonyl- aminosulfonyl]benzoic acid methyl ester (C15H16N4O6S2, Mr = 412.44) was obtained by the reaction of (4-methoxy-6-methylthio-2-pyrimidinyl)amin...The title compound 2-[(4-methoxy-6-methylthio-2-pyrimidinyl)aminocarbonyl- aminosulfonyl]benzoic acid methyl ester (C15H16N4O6S2, Mr = 412.44) was obtained by the reaction of (4-methoxy-6-methylthio-2-pyrimidinyl)amine with 2-methoxylcarbonylbenzene-sulfonylisocya- nate. The crystal is of monoclinic, space group P21/c with a =11.169(3), b = 9.508(3), c = 17.690(5) ? b = 91.593(5), Z = 4, V = 1877.9(10) 3, Dc = 1.459 g/cm3, F(000) = 856, m(MoKa) = 0.324 mm-1, R = 0.0690 and wR = 0.1368 for 3301 observed reflections (I > 2s(I)). The N(1)H…N(3) and N(2)H…O(4) hydrogen bonds can be observed. In the molecule the phenyl plane(I), pyrimi- din-2-yl-urea bridge plane(Ⅱ) and ester plane(Ⅲ) form three conjugated systems.展开更多
Self-assembled structures of 3,4,5-tris-dodecy- loxy benzoic acid methyl ester (E12), 3,4,5-tris-tetradecy- loxy-benzoic acid methyl ester (E14) and their mixture (E12/E14) have been studied on HOPG by scanning tunnel...Self-assembled structures of 3,4,5-tris-dodecy- loxy benzoic acid methyl ester (E12), 3,4,5-tris-tetradecy- loxy-benzoic acid methyl ester (E14) and their mixture (E12/E14) have been studied on HOPG by scanning tunnel- ing microscopy (STM). Dimer-like patterns induced by di- pole-dipole interaction are observed in E12 and E14 monolayers. The molecules form close-packed rows and in- terdigitate with the alkyl chains in adjacent molecules. The structural differences are proposed to be from the different length of substituted alkyl chains. Owing to similar adsorp- tion energy, phase separation is observed in the E12 and E14 mixed adlayer with different domains.展开更多
以4-氨基-3-甲基苯甲酸为起始原料,经混酸硝化反应、正丁酸酐酰化反应和甲醇酯化反应等三步合成目标产物3-甲基-4-正丁酰氨基-5-硝基苯甲酸甲酯.其中间产物和目标产物的化学结构均经1 H NMR、13 C NMR、MS等方法进行了表征.实验过程中...以4-氨基-3-甲基苯甲酸为起始原料,经混酸硝化反应、正丁酸酐酰化反应和甲醇酯化反应等三步合成目标产物3-甲基-4-正丁酰氨基-5-硝基苯甲酸甲酯.其中间产物和目标产物的化学结构均经1 H NMR、13 C NMR、MS等方法进行了表征.实验过程中还对各步反应条件进行了优化,各步在最佳反应条件下总产率可达72.6%.该合成路线简单易行,容易实现工业化生产,具有很好的应用价值.展开更多
基金The project was supported by the National Natural Science Foundation of China (20372021) and Natural Science Foundation of Hunan Province (03JJY3018)
文摘The title compound 2-[(4-methoxy-6-methylthio-2-pyrimidinyl)aminocarbonyl- aminosulfonyl]benzoic acid methyl ester (C15H16N4O6S2, Mr = 412.44) was obtained by the reaction of (4-methoxy-6-methylthio-2-pyrimidinyl)amine with 2-methoxylcarbonylbenzene-sulfonylisocya- nate. The crystal is of monoclinic, space group P21/c with a =11.169(3), b = 9.508(3), c = 17.690(5) ? b = 91.593(5), Z = 4, V = 1877.9(10) 3, Dc = 1.459 g/cm3, F(000) = 856, m(MoKa) = 0.324 mm-1, R = 0.0690 and wR = 0.1368 for 3301 observed reflections (I > 2s(I)). The N(1)H…N(3) and N(2)H…O(4) hydrogen bonds can be observed. In the molecule the phenyl plane(I), pyrimi- din-2-yl-urea bridge plane(Ⅱ) and ester plane(Ⅲ) form three conjugated systems.
文摘Self-assembled structures of 3,4,5-tris-dodecy- loxy benzoic acid methyl ester (E12), 3,4,5-tris-tetradecy- loxy-benzoic acid methyl ester (E14) and their mixture (E12/E14) have been studied on HOPG by scanning tunnel- ing microscopy (STM). Dimer-like patterns induced by di- pole-dipole interaction are observed in E12 and E14 monolayers. The molecules form close-packed rows and in- terdigitate with the alkyl chains in adjacent molecules. The structural differences are proposed to be from the different length of substituted alkyl chains. Owing to similar adsorp- tion energy, phase separation is observed in the E12 and E14 mixed adlayer with different domains.
文摘以4-氨基-3-甲基苯甲酸为起始原料,经混酸硝化反应、正丁酸酐酰化反应和甲醇酯化反应等三步合成目标产物3-甲基-4-正丁酰氨基-5-硝基苯甲酸甲酯.其中间产物和目标产物的化学结构均经1 H NMR、13 C NMR、MS等方法进行了表征.实验过程中还对各步反应条件进行了优化,各步在最佳反应条件下总产率可达72.6%.该合成路线简单易行,容易实现工业化生产,具有很好的应用价值.
