Patent ID: 7674934

Claim:
A process for preparing N-alkenyl compounds of general formula III by reacting alkynes of general formula I with NH compounds of general formula II where the Q, R 1 , R 2 , R 3 and R 4 radicals are each defined as follows: Q is C═O or CR 1 R 1 , R 4 are each independently hydrogen, C 1 -C 20 -alkyl, C 2 -C 20 -alkenyl; R 2 , R 3 are each independently hydrogen, C 1 -C 20 -alkyl, C 2 -C 20 -alkenyl; or the R 2 —N-Q-R 3 moiety is part of a saturated, unsaturated or aromatic, heterocyclic four- to eight-membered ring; in the liquid phase in the presence of a catalyst, which comprises carrying out the reaction in the presence of at least one stabilizer, wherein the stabilizer is at least one selected from the group consisting of 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-yloxy, 4-methoxy-2,2,6,6-tetramethylpiperidin-1-yloxy, phenothiazine, diethylhydroxylamine and N,N′-di-sec-butyl-p-phenylenediamine.