Journal
ORGANIC LETTERS
Volume 10, Issue 9, Pages 1671-1674Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol8004722
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Appending L-alanine to the terminal positions of a helical azobenzene oligomer produced a P helical bias, which increased with oligomer length. Irradiation gave rise to E --> Z isomerization of the terminal azo linkages, which displaced the stereogenic center Of L-Ala from the helix backbone and suppressed chiral induction. Theoretical simulations of the CD spectrum of the P helical conformation are in qualitative agreement with the experimental spectra.
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