反応 #53461
ord-15c157cfc95b44fe8d2d4ba336d9aa0a
反応方程式
反応物
試薬
反応条件
後処理
- 1その他close to 20° C.
- 2その他The organic phase is decanted off
- 3抽出extracted
- 4乾燥dried over anhydrous magnesium sulfate
- 5濃縮concentrated to dryness under reduced pressure (2.7 kPa)
- 6その他The residue obtained
- 7その他is purified by chromatography on a silica gel column (particle size 0.04-0.06 mm, diameter 2 cm, height 30 cm), at a nitrogen pressure of 0.5 bar with a mixture of dichloromethane and ethanol (95/5 by volume) as eluent
- 8その他collecting 60 cm3 fractions
- 9濃縮concentrated to dryness under reduced pressure (2.7 kPa)
実験手順
4 cm3 of a 1 M solution of tetrabutylammonium fluoride in tetrahydrofuran are added to a solution, cooled to 5° C., of 1.1 g 1-benzhydryl-3-{[3-(tert-butyldimethylsiloxymethyl)phenyl](methylsulfonyl)methylene}azetidine in 10 cm3 of tetrahydrofuran. The mixture is stirred for 3 hours at a temperature close to 20° C. and then taken up in 100 cm3 of ethyl acetate and twice 50 cm3 of water. The organic phase is decanted off, extracted, dried over anhydrous magnesium sulfate and concentrated to dryness under reduced pressure (2.7 kPa). The residue obtained is purified by chromatography on a silica gel column (particle size 0.04-0.06 mm, diameter 2 cm, height 30 cm), at a nitrogen pressure of 0.5 bar with a mixture of dichloromethane and ethanol (95/5 by volume) as eluent and collecting 60 cm3 fractions. Fractions 4 to 6 are combined and concentrated to dryness under reduced pressure (2.7 kPa). 0.5 g of 1-benzhydryl-3-[(3-hydroxymethylphenyl)(methylsulfonyl)methylene]azetidine is obtained in the form of a white solid melting at 152° C. [NMR spectrum in DMSO-d6, T=300K, δ in ppm (300 MHz): 2.95 (3H, s, SCH3), 3.80 (2H, s, NCH2), 4.20 (2H, s, NCH2), 4.50 (2H, d, J=5 Hz, OCH2), 4.75 (1H, s, NCH), 5.25 (1H, t, J=5 Hz, OH), 7.20 (2H, t, J=7 Hz, 2CH arom.), 7.30 (8H, m. 8CH arom.), 7.45 (4H, d, J=7 Hz, 4 CH arom.)].