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. Author manuscript; available in PMC: 2011 Mar 19.
Published in final edited form as: J Org Chem. 2010 Mar 19;75(6):1822–1830. doi: 10.1021/jo902268x

FIGURE 5.

FIGURE 5

Molecular models of low-energy conformers of macrocycles 9a–c, 10a,b, and 11a–d. The macrocycles were modeled as simplified homologues 9a'–c', 10a',b', and 11a'–d' in which the propyloxyammonium side chains (R = CH2CH2CH2NH3+) were replaced with methoxy groups (R = Me). Overlays represent conformers identified within the lowest 5.00 kJ/mol from 1000 Monte-Carlo conformational search steps.