Evidence for pi-Stacking as a Source of Stereocontrol in the Synthesis of the Core Pyranochromene Ring System common to Calyxin I, Calyxin J, and Epicalyxin J


Cakir S. , Stokes S., Sygula A., Mead K. T.

JOURNAL OF ORGANIC CHEMISTRY, cilt.74, ss.7529-7532, 2009 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 74 Konu: 19
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1021/jo901436u
  • Dergi Adı: JOURNAL OF ORGANIC CHEMISTRY
  • Sayfa Sayıları: ss.7529-7532

Özet

A diastereoselective synthesis of the tetrahydropyrano-chromene ring system common to several natural product isolates of Alpinia blepharocalyx is reported. We have shown that a stereochemical preference exists for a syn configuration between the anomeric aryl substituents, representative of the C-7 and C-7' substituents in the natural products. Further, our results show that stereocontrol is under kinetic control, and calculations suggest that a favorable pi-stacking interaction may be the source of this stereocontrol.