Water → HCID 59925098, compound

HRID 2300959Notes

Reaction equation

[CH3:1][O:2][C:3]1[CH:12]=[C:11]2[C:6]([CH2:7][CH:8]([S:16][CH3:17])[C:9](=O)[C:10]2([CH3:14])[CH3:13])=[CH:5][CH:4]=1.Cl.[OH:19][NH2:20].O>N1C=CC=CC=1>[CH3:1][O:2][C:3]1[CH:12]=[C:11]2[C:6]([CH2:7][CH:8]([S:16][CH3:17])[C:9](=[N:20][OH:19])[C:10]2([CH3:14])[CH3:13])=[CH:5][CH:4]=1

Participants

Conditions

Temperature: 85 °C

Procedure

To a solution of 7-methoxy-1,1-dimethyl-3-methylsulfanyl-3,4-dihydro-1H-naphthalen-2-one (0.265 g, 1.05 mmol) in pyridine (5 ml) was added hydroxyamine hydrochloride (1.09 g, 15.7 mmol). The mixture was stirred under nitrogen at 85° C. overnight. The solution was cooled to room temperature, poured into water, extracted with ethylacetate, washed with 10% KHSO4 aqueous solution, brine, dried over MgSO4, filtered. The filtrate was evaporated under vacuo. The crude product was purified by flash column chromatography using ethylacetate:Hexane (1:9) as eluant to give the desired product as white solid (0.177 g, 63%). 1H NMR (CDCl3) δ: 8.80(br, 1H), 7.05(d, 1H, J=8.2 Hz), 6.93(d, 1H, J=2.5 Hz), 6.73(dd, 1H, J=8.2 and 2.5 Hz), 4.91(t, 1H, J=3.0 Hz), 3.81(s, 3H), 3.26(dd, 1H, J=15.6 and 5.0 Hz), 2.96(dd, 1H, J=15.6and 3.0 Hz), 2.15(s, 3H), 176(s, 3H), 1.48(s, 3H). 13C NMR (CDCl3) δ: 164.5, 159.1, 145.0, 129.6, 129.4, 111.8, 111.0, 55.3, 39.8, 35.9, 32.9, 32.4, 30.8, 15.1.

Workup

temperatureThe solution was cooled to room temperature
extractionextracted with ethylacetate
washwashed with 10% KHSO4 aqueous solution, brine
dry with materialdried over MgSO4
filtrationfiltered
customThe filtrate was evaporated under vacuo
customThe crude product was purified by flash column chromatography

Sources & evidence

ORD record: ord-324ac2cd52b341cdab0245b3e59962a1
Source dataset: uspto-grants-2002_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06498196B1

Reaction notes

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