Synthese und Reduktion des Tetra‐<i>tert</i>‐butyltetraoxocalix[4]arens

Abstract

Abstract 5,11,17,23‐Tetra‐ tert ‐butyl‐25,26,27,28‐tetrahydroxy‐2,8,14,20‐tetraoxocalix[4]arene ( 4 ) was synthesized by oxidation of the tetraacetate of 5,11,17,23‐tetra‐ tert ‐butyl‐25,26,27,28‐tetrahydroxycalix[4]arene ( 1 ). Compound 4 was characterized by chemical and spectroscopic methods. Reduction of 4 with hydrazine forms the starting material 1. 4 reacts with sodium borohydride to give 5,11,17,23‐tetra‐ tert ‐butyl‐2,8,14,20,25,26,27,28‐octahydroxycalix[4]arene ( 6 ).