Hydrochloric Acid → HCID 178426931, compound

HRID 640964Notes

Reaction equation

[O:1]=[C:2]1[CH2:10][C:9]2[C:4](=[CH:5][C:6]([CH2:11][C:12]3[CH:13]=[C:14]([NH:18][C:19]([C:21]4[N:22]([CH3:27])[N:23]=[C:24]([CH3:26])[CH:25]=4)=[O:20])[CH:15]=[CH:16][CH:17]=3)=[CH:7][CH:8]=2)[NH:3]1.[CH:28](OCC)=[O:29].[O-]CC.[Na+].Cl>C(O)C>[OH:29][CH:28]=[C:10]1[C:9]2[C:4](=[CH:5][C:6]([CH2:11][C:12]3[CH:13]=[C:14]([NH:18][C:19]([C:21]4[N:22]([CH3:27])[N:23]=[C:24]([CH3:26])[CH:25]=4)=[O:20])[CH:15]=[CH:16][CH:17]=3)=[CH:7][CH:8]=2)[NH:3][C:2]1=[O:1]

Participants

Conditions

Temperature: 78 °C

Procedure

2,5-Dimethyl-2H-pyrazole-3-carboxylic acid [3-(2-oxo-2,3-dihydro-1H-indol-6-ylmethyl)-phenyl]-amide (0.100 g, 0.278 mmol) and ethyl formate (0.068 mL, 0.834 mmol) were dissolved in anhydrous ethanol (0.55 mL). The resulting solution was treated in dropwise fashion with a 21 wt % solution of sodium ethoxide in ethanol (0.519 mL, 1.39 mmol). This reaction mixture was heated at 78° C. for 1 h, producing a black oil. Subsequently, the reaction mixture was cooled to room temperature, and then the reaction pH was adjusted to pH 1 with dropwise addition of 1M HCl(aq) causing the formation of a brown precipitate. The suspension was filtered yielding an light brown solid as the pure 2,5-Dimethyl-2H-pyrazole-3-carboxylic acid [3-(3-hydroxymethylene-2-oxo-2,3-dihydro-1H-indol-6-ylmethyl)-phenyl]-amide (0.072 g, 0.186 mmol, 67%).

Workup

customproducing a black oil
temperatureSubsequently, the reaction mixture was cooled to room temperature
filtrationThe suspension was filtered

Sources & evidence

ORD record: ord-52d017365d58473481187b1998963d44
Source dataset: uspto-grants-2010_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07692005B2

Reaction notes

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