반응 #8598
ord-87029d2911b1461884aaf8aea8da9ffd
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용매
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후처리
- 1온도The mixture was heated
- 2온도at reflux for 2 hours
- 3온도The mixture was heated for an additional 1 hour
- 4기타the precipitate collected on a filter
- 5기타This material was recrystallized fromethyl acetate/methanol/ether
실험 절차
To a room temperature solution of 3-aminobenzophenone (4.0 g, 20.2 mmol) in ethanol (50 mL) was added cyanamide (1.8 mL 50 wt % in water, 23.3 mmol) followed by the dropwise addition of concentrated nitric acid (1.42 mL). The mixture was heated at reflux for 2 hours and then additional cyanamide (1.8 mL, 50 wt % in water, 23.3 mmol) and nitric acid (1.42 mL) were added. The mixture was heated for an additional 1 hour then allowed to cool to room temperature. Ether was added and the precipitate collected on a filter. This material was recrystallized fromethyl acetate/methanol/ether to yield N-(3-benzoylphenyl)guanidinium nitrate (2.5 g, 41%) as a white crystalline solid. 1H NMR (DMSO-d6): δ 9.75 (s, 1 H), 7.76 (d, 2 H), 7.69 (t, 1 H), 7.61 (d, 2 H), 7.58–7.49 (m, 9 H); 13C NMR (DMSO-d6): δ 195.01, 155.76, 138.31, 136.65, 135.80, 132.99, 130.05, 129.71, 128.67, 128.44, 127.39, 125.34; MS m/z 240 (M+1 of free base).