On the Conformational Isomers in Tetra-O-alkylcalix[4]arenes
作者： Koji Araki , Koji Iwamoto , Seiji Shinkai , Tsutomu Matsuda
DOI: 10.1246/CL.1989.1747
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摘要: p-t-Butylcalix[4]arene (14H) was alkylated with RX (R = Me, Et, Pr, and Bu) the products (14R) were analyzed by HPLC 1H NMR. It found that (i) ring inversion arising from oxygen-through-the-annulus rotation can be inhibited R greater than (ii) “cone” “partial cone” result in a 1:1 ratio, (iii) thermodynamically, conformation is most stable.
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