| abstract |
A process for preparing N-vinyl-2-imidazolines, characterized by reacting an imidazoline having the formula ** (See formula) ** wherein R1 is alkyl, including cycloalkyl, having a maximum of 18 carbon atoms, aryl having 6 to 10 carbon atoms, aralkyl having 7 to 20 carbon atoms, alkylaryl alcohol having 7 to 20 carbon atoms, carbon or alkylaryl having 7 to 20 carbon atoms, and each of R2 and R3 are hydrogen or alkyls having from 1 to 17 carbon atoms, and collectively with the carbon atoms to which they are attached they form a ring saturated aliphatic of 5 or 6 carbon atoms which may also contain alkyl substituents having a total of up to 8 additional carbon atoms, with acetylene in the presence of a strongly basic vinylization catalyst and at temperatures in the range of about 100º C, to about 250º C , thus forming an N-vinyl-2-imidazoline which has the formula ** (See formula) ** wherein R1, R2 and R3 are as defined above. (Machine-translation by Google Translate, not legally binding) |