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Tetraaddition of PhLi to a Ketocalixarene Derivative

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posted on 12.04.2007 by Lev Kuno, Noa Seri, Silvio E. Biali
Reaction of a ketocalixarene with 2.2 equiv or an excess of PhLi affords diaddition and tetraaddition products, respectively. Ionic hydrogenation of the tetraalcohol 8a yields a calix[4]arene monosubstituted by phenyl groups at all four methylene bridges.