N,N,N',N'-Tetramethylethylenediamine → HCID 178447841, compound

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Reaction Steps

0.01 mol of TMEDA is added to a solution of 0.01 mol of 4-(trans-4-n-propylcyclohexyl)-4'-trifluoromethylbiphenyl in 10 ml of n-hexane. At 0°-5° C. 0.01 mol of n-BuLi is added, and stirring at RT is continued for another half an hour and at 40° C. for half an hour. The mixture is then cooled to 0° C., 20 ml of THF are added, and the fluorinating agent 1-fluoro-2,4,6-trimethylpyridinium triflate (in THF) is added dropwise at this temperature according to scheme 21. Extractive work-up and, as is customary, chromatography and crystallization give 4-(trans-4-n-propylcyclohexyl)-3'-fluoro-4'-trifluoromethylbiphenyl.

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