Abstract
The 1-(α-alkoxybenzyl)indolizine derivative synthesized from 2-phenylethynylpyridine readily oligomerized in chloroform at room temperature. The structure of the oligomer was determined by spectral data as well as comparison with those of the dimer and the trimer which were isolated in the earlier stage of the reaction. Thus oligomer of indolizine was synthesized for the first time. It was also found that the oligomerization was catalyzed by acid and that chloroform was the most suitable solvent for the present reaction. The obtained oligomer exhibited bluish green color and turned to yellowish brown under basic conditions. This pH sensitive behavior was observed on the UV-vis spectra and the change of color showed reversibility.
Similar content being viewed by others
Article PDF
References
N. Nishiwaki, K. Furuta, M. Komatsu, and Y. Ohshiro, J. Chem. Soc., Chem. Comm., 1151 (1990).
W. Flitsch, in “Comprehensive Heterocyclic Chemistry,” Vol. 4, A. R. Katritzky, Ed., Pergamon Press, Oxford, 1984, p 443.
F. J. Swinbourne, J. H. Hunt, and G. Klinkert, Adv. Heterocycl. Chem., 23, 103 (1978).
D. H. Wadsworth, C. H. Weidener, S. L. Bender, and D. J. Beltman, J. Org. Chem., 54, 3660 (1989).
J. W. Wheeler, Eur. Pat. Appl., EP 161,789.
Chem. Abstr., 104, 170108z (1986).
A. R. Katritzky, K. C. Caster, O. Rubio, and O. Schwarz, J. Heterocyclic Chem., 23, 1315 (1986).
S. Gunzenhauser and H. Balli, Helv. Chim. Acta, 68, 56 (1985).
R. Naef, Dyes Pigm., 4, 101 (1983).
C. Holstead, Ger. Offen., 2,122,060.
Chem. Abstr., 76, 40240d (1972).
N. Nishiwaki, S. Minakata, M. Komatsu, and Y. Ohshiro, Chem. Lett., 773 (1989).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Nishiwaki, N., Furuta, K., Komatsu, M. et al. Oligomer of Indolizine Derivative and Its pH Sensitive Behavior. Polym J 23, 789–794 (1991). https://doi.org/10.1295/polymj.23.789
Issue Date:
DOI: https://doi.org/10.1295/polymj.23.789