Conformational behaviour of medium-sized rings. Part 15. 1,9,17-Triaza[2.2.2]metacyclophane-2,10,1 8-trione derivatives
作者:Farouk Eltayeb Elhadi、W. David Ollis、J. Fraser Stoddart
DOI:10.1039/p19820001727
日期:——
The stepwise synthesis of 1,9-dimethyl-1,9,17-triaza[2.2.2]metacyclophane-2,10,18-trione (1) from methyl m-aminobenzoate and m-nitrobenzoyl chloride is reported. The temperature dependences (i) of the 1H-decoupled 13C n.m.r. spectrum of the 1, 9,17-trimethyl derivative (2) and (ii) of the 1H n.m.r. spectrum of the 1,9-dimethyl-17-benzyl derivative (3) are interpreted in terms of equilibration between
从甲基1,9-二甲基- 1,9,17三氮杂[2.2.2] metacyclophane-2,10,18三酮(1)的分步合成米-氨基苯甲酸和米报道硝基苯甲酰氯。1,9,9,17-三甲基衍生物(2)的1 H解耦的13 C nmr光谱的温度依赖性(i)和1,9-二甲基-17-苄基的1 H nmr光谱的(ii)温度依赖性导数(3)根据溶液中非对映异构体冠和鞍形构象之间的平衡进行解释。据信1,9-二甲基衍生物(1)主要存在于溶液的鞍形中。