Global Patent Index - EP 1060294 A1

EP 1060294 A1 2000-12-20 - METHOD FOR CARBOXYLATING TERMINAL ALKYNES

Title (en)

METHOD FOR CARBOXYLATING TERMINAL ALKYNES

Title (de)

VERFAHREN ZUR CARBOXYLIERUNG VON TERMINALEN ALKINEN

Title (fr)

PROCEDE DE CARBOXYLATION D'ALKINES TERMINALES

Publication

EP 1060294 A1 (DE)

Application

EP 99914466 A

Priority

  • DE 19809532 A
  • EP 9901366 W

Abstract (en)

[origin: DE19809532C1] The invention relates to a method for carboxylating terminal alkynes in which terminal alkynes are used which have at least one additional aliphatic carbon atom in alpha -position and which do not posses a proton which has a higher acidity than that of the proton of the terminal triple bond. A solution is produced from the terminal alkyne and an aprotic solvent. In an undivided electrolysis cell equipped with a cathode and an anode, the solution is acted upon by carbon dioxide with a pressure which is greater than atmospheric pressure. The cathode and the anode are connected to an electric power source. The aim of the invention is to provide a method in which carbon dioxide is selectively inserted between the terminal C-H-bond, whereby the triple bond remains intact. At the same time, a nickel complex catalyst should be dispensed with. The objective is achieved by carrying out the carboxylation without a catalyst or a catalyst precursor.

IPC 1-7 (main, further and additional classification)

C25B 3/04

IPC 8 full level (invention and additional information)

C07B 41/08 (2006.01); C07C 69/606 (2006.01); C07C 69/608 (2006.01); C07C 69/734 (2006.01); C25B 3/04 (2006.01)

CPC (invention and additional information)

C25B 3/04 (2013.01)

Citation (search report)

See references of WO 9945173A1

Designated contracting state (EPC)

AT BE CH DE FR GB LI NL

EPO simple patent family

DE 19809532 C1 19990415; AT 230040 T 20030115; EP 1060294 A1 20001220; EP 1060294 B1 20021218; JP 2002506119 A 20020226; JP 3325883 B2 20020917; US 6342149 B1 20020129; WO 9945173 A1 19990910

INPADOC legal status


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