A series of newN‐(2‐benzimidazol)(S)‐α‐aminoesters and the respectiveN‐oxides have been prepared, and their spectral data discussed. The CD spectra of thealiphaticandaromaticamino ester derivatives of either series show sign reversal for the observed Cotton effect (CE) band. This chiroptical behaviour was rationalized as due to differences in conformational isomerism.
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Sabri et al. (1987) studied this question.
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