Preparation and Double Isomerization Polymerization of Substituted Cyclic Pseudoureas
Copyright policy )Preparation and Double Isomerization Polymerization of Substituted Cyclic Pseudoureas
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.
- University of Toyama Japan
- Kyoto Institute of Technology Japan
2-(2-Isoindolinyl)-2-oxazoline, Aromatic Polyureas, Cyclic Pseudoureas, Double Isomerization Polymerization
2-(2-Isoindolinyl)-2-oxazoline, Aromatic Polyureas, Cyclic Pseudoureas, Double Isomerization Polymerization
selected citations These citations are derived from selected sources.This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).5 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average
Citations provided by BIP!Popularity provided by BIP!