have been synthesized and studied by 1H- and 13C-NMR spectroscopy. In CDCl3 solution, these compounds adopt an almost perfect chair-chair conformation with the N-substituents in equatorial position. By comparing the NMR parameters of these compounds with those of some aza and diaza bi- and tri-cyclane derivatives, several stereoelectronic effects have been deduced.
摘要 合成了一系列9-酰
氧基-3,7-二
甲基-3,7-二
氮杂双环[3.3.1]
壬烷,并通过1H-和13C-NMR光谱对其进行了研究。在CDCl3溶液中,这些化合物采用近乎完美的椅椅构象,N-取代基位于赤道位置。通过将这些化合物的 NMR 参数与一些
氮杂和重
氮二环和
三环烷衍
生物的核磁共振参数进行比较,已经推导出了几种立体电子效应。