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Helical aromatic ureas

An interesting example of a conformational switch from helical to sheet stmcture is given by Zimmerman s work shown in Fig. 44.9 [74]. He synthesized heterocyclic aromatic ureas which were able to hydrogen bond intramole-cularly to form a helix, or intermolecularly to form sheet stmctures. He reported two-strand stmctures with as many... [Pg.708]

See other pages where Helical aromatic ureas is mentioned: [Pg.245]    [Pg.245]    [Pg.247]    [Pg.245]    [Pg.245]    [Pg.247]    [Pg.420]    [Pg.108]    [Pg.88]    [Pg.723]    [Pg.165]    [Pg.2]    [Pg.596]    [Pg.273]    [Pg.241]    [Pg.381]    [Pg.6833]    [Pg.1569]    [Pg.934]    [Pg.345]   


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Helical aromatics

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