Stereoregular Poly(N-propargylcarbamates) Having Helical Conformation Stabilized by the Intramolecular Hydrogen Bonds

@inproceedings{Nomura2003StereoregularPH,
  title={Stereoregular Poly(N-propargylcarbamates) Having Helical Conformation Stabilized by the Intramolecular Hydrogen Bonds},
  author={Ryouji Nomura and Shino Nishiura and Junichi Tabei and Fumio Sanda and Toshio Masuda},
  year={2003}
}
N-Propargylcarbamates (2, HC≡CCH 2 NHCO 2 R), where R = i-Bu (2a) or (S)-CH 2 CH(CH 3 )-C 2 H 5 (2b), were polymerized in the presence of a Rh catalyst, [(nbd)RhCl] 2 -Et 3 N, in CHCl 3 , giving stereoregular cis polymers as slightly yellow solids in good yields. The 1 H NMR spectra of poly(2) showed very broad signals at ambient temperature, indicating the limited mobility of the main chain. IR spectroscopic study of the polymers in CHCl 3 revealed that most of the pendant carbamate groups… CONTINUE READING

Similar Papers