Synthesis, structural and conformational study of some amides derived from 3,7-dimethyl-9-amino-3,7-diazabicyclo[3.3.1]nonane-9-carboxamide
作者:M. J. Fernandez、M. S. Toledano、E. Gálvez、E. Matesanz、M. Martínez-Ripoll
DOI:10.1002/jhet.5570290409
日期:1992.7
compounds studied display in deuteriochloroform, dimethyl sulfoxide-d6 and methanol-d4 the same preferred flattened chair-chair conformation with the methyl groups in equatorial position. The carboxamido group lies in a plane nearly perpendicular to the bispidine skeleton. The conformation and protonation sites of IVb·2HCl in the crystal state and in deuterium oxide solution are discussed.
一系列3,7-二甲基-9-氨基-3,7-二氮杂双环[3.3.1]壬烷-9-腈和3,7-二甲基-9-氨基-3,7-二氮杂双环[3.3.1]壬烷合成了-9-羧酰胺N-取代基,并通过1 H和13 C nmr光谱研究了3,7-二甲基-9-苄氨基-3,7-二氮杂双环[3.3.1]壬烷-9-羧酰胺的晶体结构。通过X射线衍射测定了二盐酸盐(IVb· 2HCl)。所研究的化合物显示在氘代氯仿,二甲基亚砜-d 6和甲醇-d 4中同样优选的扁平椅子构象,其赤道位置的甲基基团。羧酰胺基团位于几乎垂直于联吡啶的骨架的平面上。讨论了IVb· 2HCl在晶体状态和氘化溶液中的构象和质子化位点。