Patent ID: 7462745
Filing Date: 2008-12-09
Classification: C07C

Abstract:
1. A process for preparing a compound of the formula I in which X is an OR 1a or NR 1a R 1b radical, where R 1a and R 1b are selected independently from among hydrogen, a linear, branched or cyclic C 1 C- 22 -alkyl group, an alkenyl group, an alkynyl group, a C 5 -C 18 -aryl group or a —CO-alkyl-(C 1 -C 8 ) group or a —CO-aryl-(C 5 -C 10 ) group, with these groups being able to contain substituents selected or the group consisting of —CN, —COOH, —COO-alkyl-(C 1 -C 8 ), —CO-alkyl-(C 1 -C 8 ), -aryl-(C 5 -C 10 ), —COO-aryl-(C 6 -C 10 ), —CO-aryl-(C 6 -C 10 ), —O-alkyl-(C 1 -C 8 ), —O—CO-alkyl-(C 1 -C 8 ), —N-alkyl 2 -(C 1 C 8 ), —CHO, —SO 3 H, —NH 2 , —F, —Cl, —OH, —CF 3 , —NO 2 and the radicals R 1a and R 1b being able to be joined to one another via covalent bonds, from a 1,3-butadiene-containing hydrocarbon stream comprising allenically unsaturated compounds and more than 100 ppm by mass of acetylenically unsaturated compounds, in which process the acetylenically unsaturated compounds are removed in a first process step and 1,3-butadiene is reacted with a nucleophile in the presence of a metal compound in a second process step (telomerization step), wherein the hydrocarbon stream which is obtained from the first process step and is used as starting material in the second process step has a content of acetylenically unsaturated compounds of less than or equal to 100 ppm by mass and a content of allenically unsaturated compounds which is at least 75% (relative) of the original content of allenically unsaturated compounds.