<i>gem</i>-Diol and Hemiacetal Forms in Formylpyridine and Vitamin-B<sub>6</sub>-Related Compounds: Solid-State NMR and Single-Crystal X-ray Diffraction Studies
作者:Ayelén Florencia Crespi、Daniel Vega、Ana Karina Chattah、Gustavo Alberto Monti、Graciela Yolanda Buldain、Juan Manuel Lázaro-Martínez
DOI:10.1021/acs.jpca.6b07898
日期:2016.10.6
organic compounds are rarely isolated or even studied in the solid state. Here, liquid- and solid-state NMR, together with single-crystal X-ray diffraction studies, were used to show different strategies to favor the gem-diol or carbonyl moieties and to isolate hemiacetal structures in formylpyridine and vitamin-B6-related compounds. The change in position of the carbonyl group in pyridine compounds had
很少分离或什至在固态下研究有机化合物的宝石二醇部分。在这里,液相和固态NMR以及单晶X射线衍射研究被用来显示不同的策略,有利于宝石-二醇或羰基部分以及分离与甲酰吡啶和维生素B 6相关的半缩醛结构。化合物。吡啶化合物中羰基的位置变化对水合具有明显和直接的影响,而三氟乙酸的加入则增强了水合作用。由于其生物化学重要性,因此研究了维生素B 6相关化合物,重点是阐明宝石。-二醇,环状半缩醛或羰基结构可以在不同的实验条件下获得。尤其是,据报道,吡fluoro醛具有环状半缩醛结构的新外消旋混合物,形式为三氟乙酸盐和盐酸盐衍生物。