N,N,N',N'-Tetramethylethylenediamine → 1-(2-pyridyl)-1-[2,6-di(tetrahydro-2H-2-pyranyloxymethyl)phenyl]-methanol

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Reaction Steps

To a solution of 2,6-di(tetrahydro-2H-2-pyranyloxymethyl)-phenyl bromide (15.5 g, 39 mmol) in ether at -30° C. was added n-BuLi (2.5M, 16.4 ml, 41 mmol) and the mixture was allowed to warm to room temperature and stirred for 1.5 hours. The mixture was cooled to 0° C., and TMEDA (4.56 g, 37 mmol) was added, and the resulting mixture was cooled to -50° C. After stirring for 20 minutes, 2-pyridylcarboxaldehyde (6.31 g, 58 mmol) was added. The above mixture was warmed to room temperature over a period of 2 hours, quenched with saturated sodium bicarbonate, and diluted with ethyl acetate with stirring. The organic layer was washed with brine and concentrated in vacuo to afford 11.7 g (73%) of 1-(2-pyridyl)-1-[2,6-di(tetrahydro-2H-2-pyranyloxymethyl)phenyl]-methanol as an oil.

Provenance & Evidence