Abstract
Four cyclic pseudoureas, 2-(2-isoindolinyl)-2-oxazoline (1e), 2-(1,2,3,4-tetrahydroisoquinolin-2-yl)-2-oxazoline (1f), 2-(1-indolinyl)-2-oxazoline (1g) and, 2-(1,3,3-trimethyl-6-azabicyclo[3.2.1]oct-6-yl)-2-oxazoline (1i) were newly prepared. The polymerization of these monomers with methyl trifluoromethanesulfonate gave poly[(N-carbamoylimino)ethylene]s (4), pendant-type polyureas. On the other hand, the double isomerization polymerization of 1e—g with methyl iodide yielded main-chain-type polyureas, poly(1,3-diazolidin-2-one-1,3-diylalkylene)s (3). The polymerization of 1i with alkyl halides, however, did not produce 3i, but produced a polymer consisting of both 4i (the main component) and 3i units.
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Miyamoto, M., Shimakura, M., Shimoda, S. et al. Preparation and Double Isomerization Polymerization of Substituted Cyclic Pseudoureas. Polym J 27, 469–480 (1995). https://doi.org/10.1295/polymj.27.469
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DOI: https://doi.org/10.1295/polymj.27.469