作者:Mark Mascal、Ian G. Wood、Michael J. Begley、Andre S. Batsanov、Timothy Walsgrove、Alexandra M. Z. Slawin、David J. Williams、Alex F. Drake、Giuliano Siligardi
DOI:10.1039/p19960002427
日期:——
hydrogen bonding stabilizes a left-handed double helical conformation in the tryptophan-derived tetraazacyclooctadecane 1 both in solution and the solid state, whereas the analogous tryptamine-derived macrocycle 2 shows less tendency towards intramolecular hydrogen bonding and does not exist as a helix in the crystal. Azamacrocycles 1 and 2 are synthesized by a novel method and their secondary structure
环过氢键使溶液和固态色氨酸衍生的四氮杂环十八碳烯1中的左手双螺旋构象稳定,而类似的类色胺衍生的大环化合物2分子内氢键的趋势更小,并且在分子中不以螺旋形式存在。水晶。Azamacrocycles 1和2通过一种新方法合成,并通过NMR光谱,圆二色性和X射线衍射分析了它们的二级结构。分子建模不能解释1和2之间的构象差异。