反应详情

A solution of 3.52 g of 6-(diphenyl-tert-butylsilyloxymethyl)-2-pyridinecarboxylic acid methyl ester in 87 ml of tetrahydrofuran is mixed at 24° C. under nitrogen with 13.6 g of tetrabutylammonium fluoride-trihydrate and stirred for 2 hours. Then, it is mixed with 32 ml of concentrated sodium chloride solution and extracted four times with ethyl acetate. The combined organic phases are dried on sodium sulfate and after filtration, concentrated by evaporation in a vacuum. The thus obtained residue is purified by chromatography on silica gel. With hexane/50-100% ethyl acetate, 0.92 g of the title compound is obtained as colorless oil.

1. extractionextracted four times with ethyl acetate
2. customThe combined organic phases are dried on sodium sulfate
3. filtrationafter filtration
4. concentrationconcentrated by evaporation in a vacuum
5. customThe thus obtained residue is purified by chromatography on silica gel