Palladium-catalyzed formation of oxazolidinones from biscarbamates: a mechanistic study


Creative Commons License

Kilbas B., BALCI M.

BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY, cilt.7, ss.246-253, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 7
  • Basım Tarihi: 2011
  • Doi Numarası: 10.3762/bjoc.7.33
  • Dergi Adı: BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY
  • Sayfa Sayıları: ss.246-253

Özet

Oxazolidinones can be synthesized starting from cyclic biscarbamates via a palladium-catalyzed reaction. To test the proposed mechanism of this reaction, first, bicyclonorcarene endoperoxides derived from cyano and carbomethoxy cycloheptatrienes were synthesized and converted into the corresponding diols. The reaction of diols with toluenesulfonyl isocyanate followed by a palladium catalyzed reaction furnished oxazolidinone derivatives in similar yields. It was shown that, if one face of the double bond is blocked by substituents such as H or CN, the reaction also takes place. On the basis of these results, it was assumed that an antiperiplanar orientation of the metal and nucleophile is not necessary to form oxazolidinones. The metal is probably bonded to the allylic system from the same face as the nucleophile.