N-(but-3-en-1-yl)nitrone 4. Structure of product 5 was attributed on the basis of NMR and X-ray analyses. In the solid state, three crystallographically independent molecules of 5 were detected, every exhibiting a different orientation of spiro connected rings. Conformational analysis performed by DFT calculations in the gas phase was performed and revealed that the conformations observed in the crystal
摘要 7-氧杂-1-氮杂
双环[2.2.1]庚烷5的二螺衍
生物是由N-(5-烯丙基-螺[1,3-
二恶烷-2,1'-
环己烷]-5-的单一立体异构体合成的。基)
羟胺 2 和受保护的 d-
甘露糖 3,通过原位形成的 N-(but-3-en-1-yl)硝酮 4 的分子内 1,3-偶极环加成。产物 5 的结构基于 NMR和 X 射线分析。在固态下,检测到三个晶体学独立的 5 个分子,每个分子都表现出不同方向的螺连接环。在气相中通过 DFT 计算进行的构象分析表明,在晶体中观察到的构象对应于最稳定的分子几何形状。还发现其中两个在解决方案中占主导地位。