Inherently chiral calix[4]arenes with asymmetrical superposition of substituents at the lower and the upper rims of macrocycle
摘要:
Three types of inherently chiral calix[4]arenes (AAHH(BHBH), AHHH(HBBH) , AAHH(HHBH)) with asymmetrical superposition of ethyl, diethoxyphosphoryl groups at the lower rim of the macrocycle and bromine atoms at the upper rim, have been synthesized. The key steps of the synthesis are O,O'-phosphorotropic rearrangements of 1,3-distally disubstituted calix[4]arenes into 1,2-proximal isomers, regioselective bromination of the upper rim and hydrolytic removing of phosphoryl or benzoyl group from the lower rim. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
作者:Leonid N. Markovsky、Miroslav A. Vysotsky、Maxim A. Tairov、Vitaly I. Kalchenko
DOI:10.1080/10426509908546189
日期:1999.1.1
Inherentlychiral phosphoruscontaining calix[4]arenes with asymmetrical placement of substituents at the macrocyclic lower rim (phenolic oxygen atoms) as well as with asymmetrical superposition of substituents at the upper rim (para-positions of benzene rings) and at the lower rim have been synthesized. The key steps of the synthesis are O,O-phosphorotropic rearrangements of 1,3-distally disubstituted