Reaktion #569294

Reaktionsgleichung

3-benzyloxy-5-methylphenol

N,N-diisopropylethylamine

benzenesulfonyl chloride

→

title compound

Ausbeute 95.2%

Benzenesulfonic acid 3-benzyloxy-5-methylphenyl ester

Ausbeute 95.2%

Lösungsmittel

methylene chloride

water

methylene chloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   ExtraktionThe organic extract
2. 2
   Waschenwas washed sequentially with saturated NaHCO3 (2×50 mL) and brine (2×50 mL)
3. 3
   Trocknendried over Na2SO4
4. 4
   Einengenconcentrated in vacuo
5. 5
   SonstigeThe residue was purified by flash column chromatography (1:1 hexane:methylene chloride)

Vorschrift

A solution of 3-benzyloxy-5-methylphenol (400 mg, 2.0 mmol), as prepared in step a of Example 3, in methylene chloride (10 mL) at 0° C. was treated with N,N-diisopropylethylamine (0.4 mL) and benzenesulfonyl chloride (354 mg, 2.0 mmol). The reaction mixture was stirred at 0° C. for 2 h and at room temperature for 2 h. The reaction mixture was diluted with methylene chloride (200 mL) and water (50 mL). The organic extract was washed sequentially with saturated NaHCO3 (2×50 mL) and brine (2×50 mL), dried over Na2SO4, and concentrated in vacuo. The residue was purified by flash column chromatography (1:1 hexane:methylene chloride) to give the title compound as a colorless liquid (675 mg, 95%). 1H-NMR(300 MHz, CDCl3) δ 2.24 (s, 3H), 4.91 (s, 2H), 6.40 (t, 1H), 6.43 (s, 1H), 6.68 (s, 1H), 7.36 (m, 5H), 7.52 (t, 2H), 7.64 (d, 1H), 7.83 (t, 2H).

Quelle