Synthesis and lithium ion selectivity of 14-crown-4 derivatives having bulky subunits: cis and trans isomers of 2-phenylcyclohexano-14-crown-4, 2,3-diphenylcyclohexano-14-crown-4 and 2,3-di-(1-adamantyl)-14-crown-4
摘要:
顺-和反-2-苯基环己基-14-冠-4、顺-和反-2,3-二苯基环己基-14-冠-4、以及顺-和反-2,3-二-(1-金刚烷基)-制备了14-crown-4,并通过碱金属苦味酸盐的萃取、与高氯酸锂或钠的配合物的稳定常数的测量以及离子的电极响应电位测量来检查其对碱金属阳离子的离子选择性-敏感膜。根据分子力学计算估计的几何形状以及 X 射线结构分析确定的顺式和反式二苯基环己基衍生物的结构,讨论了 Li + 的络合能力对离子载体顺式/反式立体化学的显着依赖性。为了辅助讨论,还对苦味酸锂decalino-14-crown-4配合物和苯并14-crown-4与高氯酸钠的2∶1“三明治型”配合物进行了X射线结构分析。已进行。
作者:Alan P. Marchand、Dongxia Xing、Simon G. Bott、Keiichiro Ogawa、Jun Harada
DOI:10.1016/0040-4039(94)88393-9
日期:1994.11
A highly stereoselective four-step synthesis of (Z)-1,2-di(1-adamantyl)ethene (1a, overall yield 64%) which employs methyl 1-adamantanecarboxylate (2) as starting material is described. Compound 1a is isomerized quantitatively to the corresponding E- isomer (1b) by reaction with molecular iodine. Some features of the X-ray crystal structures of 1a and 1b are described.