Preparation of n-vinyl compounds

Details Preparation of n-vinyl compounds Preparation of n-vinyl compounds

C - Chemistry, Metallurgy

07

D

C07D 233/58 (2006.01) C07C 209/60 (2006.01) C07C 211/00 (2006.01) C07D 207/267 (2006.01) C07D 207/404 (2006.01) C07D 521/00 (2006.01)

Patent

CA 2131594

Preparation Of N-Vinyl Compounds Abstract of the disclosure: A process for the preparation of N-vinyl compounds of the general formula I Image (I). in which R1 and R2 independently denote hydrogen, C1-C20 alkyl, C5-C8 cycloalkyl, C7-C18 aralkyl, C6-C18 aryl or C1-C20 acyl, where one of the radicals R1 and R2 must be other than hydrogen, or the grouping R1-NR2 is a constituent part of a saturated, unsaturated or aromatic heterocyclic five-membered to seven-membered ring, which can additionally contain up to two further hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur or up to two keto functions and may additionally be benzanellated, by the reaction of NH compounds of the general formula II Image (II), with acetylene at temperatures ranging from 50° to 250°C and pressures of from 1 to 30 bar in the presence of compounds of the platinum metals acting as catalysts, wherein the acetylene is diluted in the reactor with an inert gas in a ratio by volume of from 6:1 to 0.5:1 and acetylene is forced in at the rate at which it is consumed.

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