Stereospecific synthesis of the trans-anti-trans- and trans-syn-trans- isomers of dicyclohexyl-18-crown-6
Abstract
The macrocyclic polyethers, (7) and (8), have been synthesised stereospecifically from the diastereoisomeric acyclic methylene acetals, (1) and (2), obtained from (±)-cyclohexane-trans-1,2-diol; both (7) and (8) form stable complexes with metal cations.