1-Naphthalenesulfonyl chloride → 1-Naphthalenesulfonic acid 3-benzyloxy-5-methylphenyl ester

HRID 482107Notes

Reaction equation

[CH2:1]([O:8][C:9]1[CH:10]=[C:11]([OH:16])[CH:12]=[C:13]([CH3:15])[CH:14]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C(N(CC)C(C)C)(C)C.[C:26]1([S:36](Cl)(=[O:38])=[O:37])[C:35]2[C:30](=[CH:31][CH:32]=[CH:33][CH:34]=2)[CH:29]=[CH:28][CH:27]=1>C(Cl)Cl.O>[CH2:1]([O:8][C:9]1[CH:10]=[C:11]([O:16][S:36]([C:26]2[C:35]3[C:30](=[CH:31][CH:32]=[CH:33][CH:34]=3)[CH:29]=[CH:28][CH:27]=2)(=[O:38])=[O:37])[CH:12]=[C:13]([CH3:15])[CH:14]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 0 °C

Procedure

A solution of 3-benzyloxy-5-methylphenol (600 mg, 3.0 mmol), as prepared in step a of Example 3, in methylene chloride (15 mL) at 0° C. was treated with N,N-diisopropylethylamine (0.5 mL) and 1-naphthalenesulfonyl chloride (670 mg, 3.0 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 (1.05 g, 87%). 1H-NMR (300 MHz, CDCl3) δ 2.16 (s, 3H), 4.73 (s, 2H), 6.23 (t, 1H), 6.37 (dd, 1H), 6.61 (dd, 1H), 7.28 (m, 5H), 7.48 (t, 1H), 7.67 (t, 1H), 7.77 (t, 1H), 7.97 (t, 1H), 8.12 (dt, 2H), 8.19 (dd, 1H).

Workup

extractionThe organic extract
washwas washed sequentially with saturated NaHCO3 (2×50 mL) and brine (2×50 mL)
dry with materialdried over Na2SO4
concentrationconcentrated in vacuo
customThe residue was purified by flash column chromatography (1:1 hexane:methylene chloride)

Sources & evidence

ORD record: ord-aca2af7ab7244f98baffafc7180830bc
Source dataset: uspto-grants-1998_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05792769

Reaction notes

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