Abstract
Three generations of ester-terminated dendrimers have been constructed from (1R,2S)-2-amino-1-phenyl-1,3-propanediol, 1, as the central core. The chiroptical properties of the dendrimers were measured revealing that the molar rotations [Φ] of the dendrimers decreased with increasing dendrimer generation. Comparison to a series of substituted benzoate derivatives of 1 suggested that the decrease in rotation was a consequence of a steric effect upon the conformational equilibrium of the central core that increased with increasing dendrimer generation. The optical rotations of dendrimers 7−9 were also observed to be solvent and temperature dependent.
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