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首页> 外文期刊>Crystal growth & design >NMR crystallography comparative studies of chiral (1 R,2 S,3 R,5 R)-3-amino-6,6-dimethylbicyclo[3.1.1]heptan-2-ol and its p-toluenesulfonamide derivative
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NMR crystallography comparative studies of chiral (1 R,2 S,3 R,5 R)-3-amino-6,6-dimethylbicyclo[3.1.1]heptan-2-ol and its p-toluenesulfonamide derivative

机译:手性(1 R,2 S,3 R,5 R)-3-氨基-6,6-二甲基双环[3.1.1]庚-2-醇及其对甲苯磺酰胺衍生物的NMR晶体学比较研究

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摘要

The crystal structure of (1R,2S,3R,5R)-3-amino-6,6-dimethyl-2- hydroxybicyclo[3.1.1]heptane 1 was determined and it is presented in reference to the structure of (1R,2S,3R,5R)-3-(p-tosylamino)-6,6-dimethyl-2- hydroxybicyclo[3.1.1]heptane 2. ~1H and ~(13)C chemical shifts parameters for both structures and for whole unit cells were calculated by using the GIPAW (gauge including projector augmented waves) method. Theoretically calculated chemical shift tensor parameters were verified by ~(13)C CP MAS, 2D PASS, and ~(13)C-~1H FSLG HETCOR results to obtain a full structural assignment for ~(13)C and ~1H resonances in the solid-state. PISEMA MAS experiment was performed to determine the molecular dynamics of aminoalcohol 1. The comparison of two structures, obtained after all-atom positions optimization after the GIPAW calculations, revealed small conformational differences consistent with the single-crystal X-ray diffaction results.
机译:确定了(1R,2S,3R,5R)-3-氨基-6,6-二甲基-2-羟基双环[3.1.1]庚烷1的晶体结构,并参考(1R,2S)结构进行了介绍,3R,5R)-3-(对甲苯磺酰基氨基)-6,6-二甲基-2-羟基双环[3.1.1]庚烷2。结构和整个晶胞的〜1H和〜(13)C化学位移参数使用GIPAW(包括投影仪增强波的仪表)方法进行计算。理论上计算出的化学位移张量参数通过〜(13)C CP MAS,2D PASS和〜(13)C-〜1H FSLG HETCOR结果进行了验证,以获得〜(13)C和〜1H共振的完整结构分配固体状态。进行PISEMA MAS实验以确定氨基醇1的分子动力学。在GIPAW计算后,通过全原子位置优化获得的两种结构的比较显示出与单晶X射线衍射结果一致的小构象差异。

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