作者:Takeshi Miyazaki、Shozo Yanagida、Akira Itoh、Mitsuo Okahara
DOI:10.1246/bcsj.55.2005
日期:1982.7
Benzyloxymethyl-12-crown-4, a precursor of hydroxymethyl-12-crown-4, is prepared in an excellent yield by the reaction of 3-benzyloxy-1,2-propanediol with 1,8-dichloro-3,6-dioxaoctane in the heterogeneous t-BuOLi/t-BuOH/LiBr·2H2O reaction system. The hydrogenolysis in the presence of p-toluenesulfonic acid leads to a good yield of hydroxymethyl-12-crown-4. The sandwich-type 2:1 complexation with Na+ of 12-crown-4 and hydroxymethyl-12-crown-4 derivatives was discussed on the basis of the stability constants and the solvent extraction in the CH2Cl2–water system.
苄氧基甲基-12-冠-4是羟甲基-12-冠-4的前体,通过3-苄氧基-1,2-丙二醇与1,8-二氯-3,6-二氧八烷在异相t-BuOLi/t-BuOH/LiBr·2H2O反应体系中反应制备,产率优秀。在p-甲苯磺酸存在下的氢解反应可获得良好的羟甲基-12-冠-4产率。基于稳定性常数和在CH2Cl2-水体系中的溶剂提取,讨论了12-冠-4与羟甲基-12-冠-4衍生物的夹心型2:1复合物。