Nucleophilic Functionalization of the Calix[6]arene Para- and Meta-Position via p-Bromodienone Route

J Org Chem. 2015 Jul 17;80(14):7295-300. doi: 10.1021/acs.joc.5b00978. Epub 2015 Jul 1.

Abstract

It is here demonstrated that the p-bromodienone route, previously reported for calix[4]arenes, is also effective for the functionalization of the calix[6]arene macrocycle. Thus, alcoholic O-nucleophiles can be introduced at the calix[6]arene exo rim. In addition, the reaction of a calix[6]arene p-bromodienone derivative with an actived aromatic substrate, such as resorcinol, led to the first example of a meta-functionalized, inherently chiral calix[6]arene derivative.