Synthesis and Crystal Structure of Monofluorinated Iminosugar Derivative (S)-1-((3R,4R,5S)-1-benzyl-4-fluoro-5-((4-nitrobenzoyl)oxy)piperidin-3-yl)ethane-1,2-diyl Bis(4-nitrobenzoate)
作者:Yi Yang、Yu-Long Li、Chun-Ru Cheng、Zhi-Wen Deng、Yin-Ping Liu、Wei Yuan
DOI:10.14233/ajchem.2014.16492
日期:——
Monofluorinated iminosugar derivative (S)-1-((3R,4R,5S)-1-benzyl-4-fluoro-5-((4-nitrobenzoyl)oxy)piperidin-3-yl)ethane-1,2-diyl bis(4-nitrobenzoate) (I) has been synthesized from triol (II) via ester formation. Compound (I) was fully characterized by IR, MS and 1H (13C, 19F) NMR spectra. In addition, the molecular structure of this compound was established by X-ray crystallography. The crystal of title compound crystallizes in monoclinic, spacegroup P21/n with a = 7.2630(14), b = 20.461(4), c = 11.456(2) Å, a = 90.00, b = 96.877(4), g = 90°, V = 1690.3(6) Å3, Z = 2, C35H29FN4O12, Mr = 716.62, Dc = 1.408 g/cm3, F(000) = 744 and μ(MoKa) = 0.111 mm-1. The final R = 0.0824 and wR = 0.2177 for 8897 observed reflections [I > 2s(I)] and R = 0.1333 and wR = 0.2497 for all data. From the analysis of the crystal structure, it was observed that the piperidinyl ring adopted the chair form conformation with the equatorial location of the large group. The identified distortions of conjugated systems, orthogonal multipolar interactions and p binding forces were also discussed through the analysis of electrostatic interactions at their origin.
单
氟亚胺糖衍
生物 (S)-1-((3R,4R,5S)-1-
苄基-4-
氟-5-((4-
硝基苯甲酰基)
氧基)
哌啶-3-基)
乙烷-1,2-二基双(4-硝基
苯甲酸酯) (I) 是由三醇 (II) 通过
酯形成法合成的。通过红外光谱、质谱和 1H (13C, 19F) NMR 光谱对化合物 (I) 进行了全面鉴定。此外,还通过 X 射线晶体学确定了该化合物的分子结构。标题化合物的晶体为单斜晶系,空间群为 P21/n,a = 7.2630(14),b = 20.461(4),c = 11.456(2)埃,a = 90.00,b = 96.877(4),g = 90°,V = 1690.3(6) Å3,Z = 2,
C35H29FN4O12,Mr = 716.62,Dc = 1.408 g/cm3,F(000) = 744,μ(MoKa) = 0.111 mm-1。对于 8897 个观察到的反射 [I > 2s(I)],最终 R = 0.0824,wR = 0.2177;对于所有数据,最终 R = 0.1333,wR = 0.2497。对晶体结构的分析表明,
哌啶环采用了椅状构象,大基团位于赤道位置。通过分析静电相互作用的起源,还讨论了共轭体系的畸变、正交多极相互作用和 p 结
合力。