ATOM-ECONOMIC WASTE-FREE METHOD OF PRODUCING 2-(4-FLUORPHENYL)-BUT-3-IN-2-OLA Russian patent published in 2017 - IPC C07C29/42 C07C33/48 

Abstract RU 2629024 C1

FIELD: chemistry.

SUBSTANCE: method consists in reacting 4-fluoroacetophenone with an acetylenic compound in the presence of solvents. The acetylene compound is gaseous acetylene and, as a solvent, dimethylsulfoxide containing 0.1-0.5% of water, the process is carried out in the presence of a catalytic system, which is prepared by preheating hydrated potassium hydroxide, diethylene glycol and dimethylsulfoxide at a molar ratio of 4-fluoroacetophenone: KOH×0.5H2O: diethylene glycol of 1:0.25-1.0:0.5-1.0, at the temperature of 100-120°C for 0.5-1.0 h, the main reaction is carried out at the temperature of 10-20°C for 1-4 hours, and the desired product is isolated by extraction with diethyl ether, followed by distillation in vacuum.

EFFECT: obtaining the target alcohol with a yield of 91 percent.

8 ex

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RU 2 629 024 C1

Authors

Trofimov Boris Aleksandrovich

Shmidt Elena Yurevna

Protsuk Nadezhda Ilinichna

Dates

2017-08-24Published

2016-05-04Filed