The title compound (C23H22N2O) 3 has been synthesized by the reaction of (S)- (-)-1,1-diphenyl-2-pyrrolidinemethanol 1 with 2-pyridinecarboxaldehyde 2 in refluxing benzene catalyzed by TsOH, and its structure was dete...The title compound (C23H22N2O) 3 has been synthesized by the reaction of (S)- (-)-1,1-diphenyl-2-pyrrolidinemethanol 1 with 2-pyridinecarboxaldehyde 2 in refluxing benzene catalyzed by TsOH, and its structure was determined by single-crystal X-ray diffraction. The crystal belongs to orthorhombic, space group P212121 with a = 8.4747(8), b = 10.8829(10), c = 19.777(2) , Mr = 342.43, V =1824.0(3) 3, Dc = 1.247 g/cm3, Z = 4, m = 0.077 mm-1 and F(000) = 728. The structure was solved by direct methods and refined by full-matrix least-squares techniques to the final R = 0.0497 and wR = 0.0927.展开更多
4-羟基-L-脯氨酸、半胱胺盐酸为反应材料,经过一系列的氨基保护、氧化、缩合反应,得到Teneligliptin的关键中间体(2S)-4-氧代-2-(3-噻唑烷基羰基)-1-吡咯烷羧酸叔丁酯,收率可达73.8%。开发了一种全新的合成方式,在氧化阶段进行了改进和...4-羟基-L-脯氨酸、半胱胺盐酸为反应材料,经过一系列的氨基保护、氧化、缩合反应,得到Teneligliptin的关键中间体(2S)-4-氧代-2-(3-噻唑烷基羰基)-1-吡咯烷羧酸叔丁酯,收率可达73.8%。开发了一种全新的合成方式,在氧化阶段进行了改进和创新,对其质量进行控制,整个路线对环境几乎没有污染,并且通过1 H NMR和ESI-MS确认了设备的结构。展开更多
This paper investigates the third series of the 2s+1 p0 helium states. The anisotropism of the electronic distribution is presented, the partial-wave compositions of the states are compared with each other, and the an...This paper investigates the third series of the 2s+1 p0 helium states. The anisotropism of the electronic distribution is presented, the partial-wave compositions of the states are compared with each other, and the angular correlation is intuitively shown by the shape-density. Two types of radial-radial correlation, namely, the "gradually push" and the "sudden transition", have been identified and the approximate symmetry with respect to the interchange of r1 and r2 has been evaluated.展开更多
基金the National Natural Science Foundation of China (No. 20172039)
文摘The title compound (C23H22N2O) 3 has been synthesized by the reaction of (S)- (-)-1,1-diphenyl-2-pyrrolidinemethanol 1 with 2-pyridinecarboxaldehyde 2 in refluxing benzene catalyzed by TsOH, and its structure was determined by single-crystal X-ray diffraction. The crystal belongs to orthorhombic, space group P212121 with a = 8.4747(8), b = 10.8829(10), c = 19.777(2) , Mr = 342.43, V =1824.0(3) 3, Dc = 1.247 g/cm3, Z = 4, m = 0.077 mm-1 and F(000) = 728. The structure was solved by direct methods and refined by full-matrix least-squares techniques to the final R = 0.0497 and wR = 0.0927.
文摘4-羟基-L-脯氨酸、半胱胺盐酸为反应材料,经过一系列的氨基保护、氧化、缩合反应,得到Teneligliptin的关键中间体(2S)-4-氧代-2-(3-噻唑烷基羰基)-1-吡咯烷羧酸叔丁酯,收率可达73.8%。开发了一种全新的合成方式,在氧化阶段进行了改进和创新,对其质量进行控制,整个路线对环境几乎没有污染,并且通过1 H NMR和ESI-MS确认了设备的结构。
文摘This paper investigates the third series of the 2s+1 p0 helium states. The anisotropism of the electronic distribution is presented, the partial-wave compositions of the states are compared with each other, and the angular correlation is intuitively shown by the shape-density. Two types of radial-radial correlation, namely, the "gradually push" and the "sudden transition", have been identified and the approximate symmetry with respect to the interchange of r1 and r2 has been evaluated.
