Water → 2-acetamido-N-(4-nitrophenyl)benzamide

HRID 547520

Reaction equation

[C:1]([NH:4][C:5]1[CH:6]=[C:7]([CH:11]=[CH:12][CH:13]=1)C(O)=O)(=[O:3])[CH3:2].C1N=CN([C:19]([N:21]2C=N[CH:23]=[CH:22]2)=[O:20])C=1.[N+:26]([C:29]1[CH:35]=CC(N)=[CH:31][CH:30]=1)([O-:28])=[O:27].O>CN1CCCC1=O>[C:1]([NH:4][C:5]1[CH:13]=[CH:12][CH:11]=[CH:7][C:6]=1[C:19]([NH:21][C:22]1[CH:23]=[CH:35][C:29]([N+:26]([O-:28])=[O:27])=[CH:30][CH:31]=1)=[O:20])(=[O:3])[CH3:2]

Participants

Conditions

Temperature: 57.5 °C

Procedure

A mixture of 3-acetamidobenzoic acid (C1) (5.30 g, 29.58 mmol) and CDI (5.75 g, 35.50 mmol, 1.2 equivalent) in N-methylpyrrolidinone (20 mL) was heated at 55-60° C. for 2 h. 4-Nitroaniline (6.13 g, 44.37 mmol, 1.5 equivalent) was then added and the mixture was heated to 140° C. for 4 h, then poured into water (400 mL) and stirred for 18 h. The resulting precipitate was filtered and washed sequentially with water and CH2Cl2 and then crystallized from MeOH to give C2 (4.84 g; 55%) as a yellow solid; mp (MeOH) 259-261° C.; 1H NMR [(CD3)2SO] δ 10.80 (s, 1 H, NH), 10.15 (s, 1 H, NH), 8.29 (m, 2 H, H-{acute over (3)}& H-{acute over (5)}), 8.12 (t, J=1.8 Hz, 1 H, H-2), 7.84 (br dd, J=8.1, 1.2 Hz, 1 H, H-6), 7.65 (td, J=7.8, 2.5 Hz, 1 H, H-4), 7.48 (t, J=7.9 Hz, 1 H, H-5), 2.08 (s, 3H, COCH3); Anal. Calc. For C15H13N3O4: C, 60.2; H, 4.4; N, 14.0; found C, 60.4; H, 4.6; N, 14.1%.

Workup

temperaturethe mixture was heated to 140° C. for 4 h
filtrationThe resulting precipitate was filtered
washwashed sequentially with water and CH2Cl2
customcrystallized from MeOH

Sources & evidence

ORD record: ord-98575b1f5f1c4b22bb9bf237dcaca054
Source dataset: uspto-grants-2011_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07939546B2

Linked notes

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