Diametric calix[6]arene-based phosphine gold(I) cavitands

Abstract

We report the synthesis and characterization, in low polarity solvents, of a novel class of diametric phosphine gold(I) cavitands characterized by a 1,2,3-alternate geometry. Preliminary catalytic studies were performed on a model cycloisomerization of 1,6-enynes as a function of the relative orientation of the bonded gold(I) nuclei with respect to the macrocyclic cavity.

Keywords

• 1,2,3-alternate conformation
• calix[6]arenes
• gold(i) catalysis
• phosphines