3-Chloro-6-hydroxyacetophenone → HCID 136265205, compound

HRID 1777062Notes

Reaction equation

[NH:1]([C:3]([C:5]1[CH:6]=[C:7]([S:11]([NH2:14])(=[O:13])=[O:12])[CH:8]=[CH:9][CH:10]=1)=[O:4])[NH2:2].[Cl:15][C:16]1[CH:17]=[CH:18][C:19]([OH:25])=[C:20]([C:22](=O)[CH3:23])[CH:21]=1>CO.C(O)(=O)C>[Cl:15][C:16]1[CH:17]=[CH:18][C:19]([OH:25])=[C:20](/[C:22](=[N:2]/[NH:1][C:3]([C:5]2[CH:6]=[C:7]([S:11]([NH2:14])(=[O:13])=[O:12])[CH:8]=[CH:9][CH:10]=2)=[O:4])/[CH3:23])[CH:21]=1

Participants

Conditions

Temperature: 120 °C

Procedure

3-(hydrazinecarbonyl)benzenesulfonamide (50 mg, 0.232 mmol) and 1-(5-chloro-2-hydroxyphenyl)ethanone (39.6 mg, 0.232 mmol) was dissolved in methanol (Volume: 4 ml) in the presence of acetic acid as a catalyst and then the reaction mixture was heated via microwave irradiation to 120° C. for 30 min. Reaction was monitored by TLC. After completion of the reaction, following cooling, the solvent was removed by vacuum and the resulting crude material was purified by flash column chromatography (2% CH3OH/CH2Cl2) afforded the product (E)-3-(2-(1-(5-chloro-2-hydroxyphenyl)ethylidene)hydrazinecarbonyl)benzenesulfonamide (36 mg, 0.094 mmol, 40.4% yield) as a solid. 1H NMR (DMSO-d6, 400 MHz): δ 8.34 (s, 1H), 8.15 (d, 1H, J=7.6 Hz), 8.02 (d, 1H, J=7.6 Hz), 7.73 (t, 1H, J=8.0 Hz), 7.64 (m, 1H), 7.51 (bs, 2H), 7.32 (dd, 1H, J=2.4 & 8.4 Hz), 6.92 (d, 1H, J=8.4 Hz), 2.49 (s, 3H). Mass [M+H]+: 368.0

Workup

customReaction
customAfter completion of the reaction
temperaturefollowing cooling
customthe solvent was removed by vacuum
customthe resulting crude material was purified by flash column chromatography (2% CH3OH/CH2Cl2)

Sources & evidence

ORD record: ord-df6d2729e4a44a178a37e1068e716078
Source dataset: uspto-grants-2016_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09266838B2

Reaction notes

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