Potassium tert-butoxide → 1,2-Dichloro-3-(trifluoroprop-1-YN-1-YL)benzene

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Reaction Steps

To a solution of 31.7 g of (2-chloro-3,3,3-trifluoropropen-1-yl)-2,3-dichlorobenzene in 50 ml of tert-butanol, there is added dropwise at RT a solution of 14.1 g of potassium tert-butylate in 750 ml of tert-butanol in such a manner that the temperature of the reaction solution does not exceed 30° C. After continued stirring at RT for 18 h, the mixture is taken up in ice-water and extracted with ether. The organic phases are combined, washed with water and sodium chloride solution, and concentrated by evaporation. There is thus obtained, after distillation in vacuo, 2,3-dichloro-(3,3,3-trifluoropropyn-1-yl)-benzene in the form of colourless oil, b.p. 92°-98° C. at 22 mb (compound No. 2.27).

Provenance & Evidence