PREPARATION AND DOUBLE ISOMERIZATION POLYMERIZATION OF SUBSTITUTED CYCLIC PSEUDOUREAS

Four cyclic pseudoureas, 2-(2-isoindolinyl)-2-oxazoline (le), 2-(1,2,3 ,4-tetrahydroisoquinolin-2-yl)-2-oxazoline (If), 2-(1-indolinyl)-2-oxa zoline (Ig) and, trimethyl-6-azabicyclo[3.2.1]oct-6-yl)-2-oxazoline (i i) were newly prepared. The polymerization of these monomers with meth yl trifluoromethanesulfonate gave poly[(N-carbamoylimino)ethylene] s ( 4), pendant-type polyureas. On the other hand, the double isomerizatio n polymerization of 1e-g with methyl iodide yielded main-chain-type po lyureas, poly(1,3-diazolidin-2-one- 1,3-diylalkylene)s (3). The polyme rization of ii with alkyl halides, however, did not produce 3i, but pr oduced a polymer consisting of both 4i (the main component) and 3i uni ts.