A cyclohexane pro-inophore is held in one chair form (non-ionophoric) by a large, tertiary, ketal moiety. Upon hydrolysis the acetyl group is small enough to be axial and the cyclohexane ring can flip to an ionophoric conformation.
A cyclohexane pro-inophore is held in one chair form (non-ionophoric) by a large, tertiary, ketal moiety. Upon hydrolysis the acetyl group is small enough to be axial and the cyclohexane ring can flip to an ionophoric conformation.