Hydroxylamine → HCID 86668983, compound

HRID 1410170Notes

Reaction equation

[NH2:1][OH:2].[CH3:3]/[C:4](/[C:7]1[N:11]([C:12]2[CH:17]=[CH:16][C:15]([OH:18])=[CH:14][C:13]=2[F:19])[N:10]=[C:9]([CH3:20])[C:8]=1[C:21]#[N:22])=[CH:5]/[CH3:6].CC1SC=C(C)C=1C1N(C2C=CC(O)=CC=2F)N=C(C)C=1C#N>CO>[CH3:3]/[C:4](/[C:7]1[N:11]([C:12]2[CH:17]=[CH:16][C:15]([OH:18])=[CH:14][C:13]=2[F:19])[N:10]=[C:9]([CH3:20])[C:8]=1[C:21](=[N:1][OH:2])[NH2:22])=[CH:5]/[CH3:6]

Participants

Conditions

Temperature: 150 °C

Procedure

Hydroxylamine (50 wt % solution in water, 0.5 mL, 8.11 mmol) was added to (Z)-5-(but-2-en-2-yl)-1-(2-fluoro-4-hydroxyphenyl)-3-methyl-1H-pyrazole-4-carbonitrile (22 mg, 0.08 mmol) dissolved in MeOH (1.0 mL) or Hydroxylamine (50 wt % solution in water, 0.24 mL, 3.97 mmol) was added to 5-(2,4-dimethylthiophen-3-yl)-1-(2-fluoro-4-hydroxyphenyl)-3-methyl-1H-pyrazole-4-carbonitrile (13 mg, 0.04 mmol) dissolved in MeOH (0.8 mL). The reaction was heated at 150° C. in the microwave for 15 min. Purification using preparative HPLC gave 5-((Z)-but-2-en-2-yl)-1-(2-fluoro-4-hydroxyphenyl)-N′-hydroxy-3-methyl-1H-pyrazole-4-carboximidamide (E51) (11.44 mg, 46%), ES/MS m/z: 305.08 (M+H), 303.13 (M−H); 1H NMR (acetone-d6, 500 MHz): 7.22 (m, 1H), 6.76-6.71 (m, 2II), 5.65 (m, 1H), 2.30 (s, 3H), 1.83 (s, 3H) and 1.39 (d, 3H, J=6.7 Hz) or 5-(2,4-dimethylthiophen-3-yl)-1-(2-fluoro-4-hydroxyphenyl)-N′-hydroxy-3-methyl-1H-pyrazole-4-carboximidamide (E52) (4.31 mg, 30%) ES/MS m/z: 361.05 (M+H), 359.17 (M−H); 1H NMR (acetone-d6, 500 MHz): 7.14 (t, 1H, J=8.8 Hz), 6.83 (q, 1H, J=1.0 Hz), 6.66 (m, 1H), 6.61 (dd, 1H, J=11.9, 2.7 Hz), 2.38 (s, 3H), 2.16 (s, 3H) and 1.94 (d, 3H, J=1.0 Hz).

Workup

customPurification

Sources & evidence

ORD record: ord-a900db4af2be4333baaffacc1047b7c1
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08921402B2

Reaction notes

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