Synthesis of N-substituted Pyrido[4,3-d]pyrimidines for the Large-Scale Production of Self-Assembled Rosettes and Nanotubes


DURMUS A., Gunbas G. , Farmer S. C. , Ohnstead M. M. , MASCAL M., Legese B., ...Daha Fazla

JOURNAL OF ORGANIC CHEMISTRY, cilt.78, ss.11421-11426, 2013 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 78 Konu: 22
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1021/jo4019792
  • Dergi Adı: JOURNAL OF ORGANIC CHEMISTRY
  • Sayfa Sayıları: ss.11421-11426

Özet

N-substituted pyrido[4,3-d]pyrimidines are heterocycles which exhibit the asymmetric hydrogen bonding codes of both guanine and cytosine at 60 degrees angles to each other, such that the molecules self-organize unambiguously into a cyclic hexamer, assembled via 18 intermolecular hydrogen bonds. The synthesis is straightforward and can be concluded in six steps from the commercially available malononitrile dimer. X-ray crystallographic analysis of the supermacrocyclic structure shows an undulating disk with a ca. 10.5 angstrom cavity, the centers of which do not overlap sufficiently to describe a channel in the solid state. However, AFM, SEM, and TEM imaging in solution reveals the formation of 1D nanostructures in agreement with their self-assembly into rosette supermacrocycles, which then stack linearly to form rosette nanotubes.