On the anomeric preference of the isothiocyanato group
作者:Concepción Sosa-Gil、Reyes Babiano、Pedro Cintas、Mark E. Light、Juan C. Palacios
DOI:10.1039/d1nj00852h
日期:——
This work is aimed at providing a systematic and comprehensive analysis of the anomeric effect exerted by the isothiocyanato (NCS) group taking the xylopyranose ring as a scaffold because enhanced effects have been detected in that ring-bearing halogen and pseudohalogen substituents. To this end, both α- and β-anomers of tri-O-acetoxypyranosyl-D-xylose have been prepared and thoroughly characterized
这项工作的目的是对异硫氰酸根合 (N C S) 基团以吡喃木糖环作为支架所产生的异头效应提供系统和全面的分析,因为在带环的卤素和假卤素取代基中检测到了增强的效应。为此,三-O-乙酰氧基吡喃糖基-D的α-和β-端基异构体-木糖已经制备并彻底表征。异硫氰酸根合基团的轴向偏好反映了主要的异头效应,其起源可以通过 DFT 计算确定,并通过自然键轨道 (NBO) 分析揭示的立体电子相互作用的识别来确定。通过这种方式,本研究扩展了偏向于单糖和相关杂环的构象和反应性的组库。
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