Synthesis and alkali metal picrate extraction capabilities of novel cage-functionalized 17-crown-5 and 17-crown-6 ethers
摘要:
The syntheses of three novel cage-functionalized 17-crown-5 and 17-crown-6 ethers, i. e., 10-12, are reported and the results of alkali metal picrate extraction experiments performed by using each of these crown ethers in turn as the extractant are described. Their respective relative extraction efficiencies toward alkali metal picrates were compared with the corresponding efficiencies of 15-crown-5 and benzo-15-crown-5 solutions at the same concentration. The extraction profile of 10 (17-crown-5) toward alkali metal picrates is similar to that of 15-crown-5; however, 10 displays 33% greater avidity toward Na+ picrate. The ability of 11 (benzo-17-crown-5) to extract Li+, Rb+, and Cs+ picrates is similar to that of benzo-15-crown-5. Crown ether 10 is ca. 3 times more effective than 11 toward extraction of K+ picrate. The alkali metal picrate extraction profile of 12 (17-crown-6) resembles that of 10; however, 12 shows enhanced avidity vis-a-vis 10 toward Na+, K+, Rb+, and Cs+ picrates. (C) 1997 Elsevier Science Ltd.
Synthesis and alkali metal picrate extraction capabilities of novel cage-functionalized 17-crown-5 and 17-crown-6 ethers
摘要:
The syntheses of three novel cage-functionalized 17-crown-5 and 17-crown-6 ethers, i. e., 10-12, are reported and the results of alkali metal picrate extraction experiments performed by using each of these crown ethers in turn as the extractant are described. Their respective relative extraction efficiencies toward alkali metal picrates were compared with the corresponding efficiencies of 15-crown-5 and benzo-15-crown-5 solutions at the same concentration. The extraction profile of 10 (17-crown-5) toward alkali metal picrates is similar to that of 15-crown-5; however, 10 displays 33% greater avidity toward Na+ picrate. The ability of 11 (benzo-17-crown-5) to extract Li+, Rb+, and Cs+ picrates is similar to that of benzo-15-crown-5. Crown ether 10 is ca. 3 times more effective than 11 toward extraction of K+ picrate. The alkali metal picrate extraction profile of 12 (17-crown-6) resembles that of 10; however, 12 shows enhanced avidity vis-a-vis 10 toward Na+, K+, Rb+, and Cs+ picrates. (C) 1997 Elsevier Science Ltd.
COMPOUNDS CONTAINING AN ALICYCLIE STRUCTURE AND ANTI-TUMOR APPLICATION
申请人:Xu Lifeng
公开号:US20140045779A1
公开(公告)日:2014-02-13
This invention relates with anti-tumor activities of new compounds containing an adamantyl group or analogs thereof. The invention also relates with the medication applications of anti-tumor and other diseases by this kind of compounds with the combination of S, P, T structures containing adamantyl group and the formation of stereoisomer, tautomers, prodrug, pharmaceutically acceptable salts, complex salts or solvates to their anticancer application and anticancer agents, which have the following general formula:
Synthesis and alkali metal picrate extraction capabilities of novel cage-functionalized 17-crown-5 and 17-crown-6 ethers
作者:Alan P. Marchand、Kaipenchery A. Kumar、Artie S. McKim、Kata Mlinarié-Majerski、Goran Kragol
DOI:10.1016/s0040-4020(97)00075-6
日期:1997.3
The syntheses of three novel cage-functionalized 17-crown-5 and 17-crown-6 ethers, i. e., 10-12, are reported and the results of alkali metal picrate extraction experiments performed by using each of these crown ethers in turn as the extractant are described. Their respective relative extraction efficiencies toward alkali metal picrates were compared with the corresponding efficiencies of 15-crown-5 and benzo-15-crown-5 solutions at the same concentration. The extraction profile of 10 (17-crown-5) toward alkali metal picrates is similar to that of 15-crown-5; however, 10 displays 33% greater avidity toward Na+ picrate. The ability of 11 (benzo-17-crown-5) to extract Li+, Rb+, and Cs+ picrates is similar to that of benzo-15-crown-5. Crown ether 10 is ca. 3 times more effective than 11 toward extraction of K+ picrate. The alkali metal picrate extraction profile of 12 (17-crown-6) resembles that of 10; however, 12 shows enhanced avidity vis-a-vis 10 toward Na+, K+, Rb+, and Cs+ picrates. (C) 1997 Elsevier Science Ltd.