A Chiral 28-Membered Macrocycle with Symmetry and Structure Similar to That of trans-Cyclooctene
摘要:
[GRAPHICS]A bridged N,N-di(aryl)-1,2,4,5-benzenedlimide was synthesized in which restricted rotation led to two diasteriomeric conformations at room temperature. The more stable syn-macrocycle is achiral, whereas the strained ant macrocycle possesses planar chirality similar to that of trans-cyclooctene. The structure was characterized by X-ray crystallography, and the enantiomers were resolved by chiral chromatography.