Nitric Acid → HCID 178468339, compound

HRID 2089753Notes

Reaction equation

[NH2:1][C:2]1[CH:9]=[CH:8][C:5]([C:6]#[N:7])=[CH:4][CH:3]=1.P(=O)(O)(O)O.[N+]([O-])(O)=O.[N:19]([O-])=O.[Na+].[CH3:23][C:24](=[O:29])[CH2:25][C:26](=[O:28])[CH3:27].C([O-])(=O)C.[K+].C([O-])([O-])=O.[Na+].[Na+]>C(O)C>[C:26]([C:25](=[N:19][NH:1][C:2]1[CH:9]=[CH:8][C:5]([C:6]#[N:7])=[CH:4][CH:3]=1)[C:24](=[O:29])[CH3:23])(=[O:28])[CH3:27]

Participants

Conditions

Temperature: -6 °C

Procedure

4-Aminobenzonitrile (500 mg, 4.24 mmol) was added to a solution of 3 mL of phosphoric acid (85%) and 2 mL of nitric acid (65%) at −6° C. When the mixture reached to room temperature it was cooled to −6° C. and solid sodium nitrite (292 mg, 4.24 mmol) was added during 10 min. Small pieces of ice (50 g) were added into the solution. The mixture was added at 0° C. to a suspension of corresponding 2,4-pentanedione (424 mg, 4.24 mmol) and potassium acetate (20 g) in ethanol (250 mL). The solution was stirred for 15 min, added to 250 mL of saturated Na2CO3 aqueous solution, extracted with dichloromethane, washed with water and brine, dried over Na2SO4, and concentrated under reduced pressure to give 4-[2-(1-acetyl-2-oxopropylidene)hydrazino]benzonitrile (280 mg, 29%).

Workup

customreached to room temperature
extractionextracted with dichloromethane
washwashed with water and brine
dry with materialdried over Na2SO4
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-d4e6439fb72140e7a8aa64256053bc6b
Source dataset: uspto-grants-2013_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08435995B2

Reaction notes

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