Abstract
Optically active 1- (R) -2-diethylethylenimine has been prepared from (R) -2-ethylamino-1-butanol, obtained by the reaction of ethylbromide with (R) -2-amino-1-butanol, sulfuric acid and sodium hydroxide. The polymerization of 1- (R) -2-diethylethylenimine catalyzed by boron trifluoride etherate gave a very viscous polymer, whose molecular weight was estimated to be about 3000-5000. The ring opening of the unsymmertically substituted 1- (R) -2-diethylethylenimine occurred only at the β-position. The polymerization of the monomer gave an optically active stereoregular polymer.
