作者:F. Dietl、G. Gierer、A. Merz
DOI:10.1055/s-1985-34140
日期:——
Quinones of Benzo- and Dibenzo-Crown Ethers: The preparation of the 1,4-quinones of benzo[15]crown-5 (1), benzo [18]crown-6 (2) and dibenzo[18]crown-6 (3) and their quinols is described. The quinones are obtained by Fremy salt oxidation of the corresponding 3-hydroxybenzo-crown ethers which are readily accessible by a double protective group synthesis from 1,2,3-trihydroxybenzene. The synthetic pathway also provides a general high yield preparation of 2,3-dialkoxyl-1,4-benzoquinones. The new crown ethers are characterised b y 1H- and 13C-N. M. R. as well as U. V. spectroscopy. Non-aqueous redox potentials are determined by cyclic voltammetry. Crystalline complexes of 1 and 2 with various ammonium, alkali, and alkaline earth cations are also described.
苯并冠醚和二苯并冠醚的醌:文中描述了苯并[15]冠-5(1)、苯并[18]冠-6(2)和二苯并[18]冠-6(3)的1,4-醌及其醇的制备。这些醌是通过Fremy盐氧化相应的3-羟基苯并冠醚获得的,这些冠醚可以通过从1,2,3-三羟基苯进行双保护基合成而轻易获取。合成路径还提供了一种高产率制备2,3-二烷氧基-1,4-苯醌的一般方法。新冠醚通过1H和13C-NMR以及紫外光谱进行特征鉴定。通过循环伏安法测定非水相的氧化还原电位。还描述了1和2与各种铵、碱金属和碱土金属阳离子的结晶复合物。