تفاعل #716004

معادلة التفاعل

sodium hydride

4-aminobenzamidine dihydrochloride

3-(3-dimethylamino-acryloyl)-benzonitrile

→

3-[2-(4-amino-phenyl)-pyrimidin-4-yl]-benzonitrile

المردود 56.0%

المذيبات

ethanol

ظروف التفاعل

المعالجة

1. 1
   workup.STIRRINGto stir for 5 min
2. 2
   درجة الحرارةthe resulting mixture is heated
3. 3
   درجة الحرارةto reflux for 3 h.
4. 4
   درجة الحرارةthen cooled to ambient temperature
5. 5
   workup.STIRRINGstirred for 60 h
6. 6
   أخرىThe mixture is evaporated
7. 7
   أخرىthe resulting mixture is triturated with diethyl ether
8. 8
   ترشيحfiltered
9. 9
   أخرىThe filtrate is evaporated
10. 10
    أخرىto afford a yellow oil, which
11. 11
    أخرىis separated by column chromatography (1:1 ethyl acetate-hexane)

الإجراء التجريبي

Part A. A flask containing absolute ethanol (10 mL) is cooled to 0° C., and sodium hydride (42 mg, 60% w/w with mineral oil, 1.05 mmol) is added. After stirring for 0.5 h., the solution is treated with 4-aminobenzamidine dihydrochloride (104 mg, 0.50 mmol) and the mixture is allowed to stir for 5 min. Then, 3-(3-dimethylamino-acryloyl)-benzonitrile (100 mg, 0.50 mmol) is added, and the resulting mixture is heated to reflux for 3 h. then cooled to ambient temperature and stirred for 60 h. The mixture is evaporated, and the resulting mixture is triturated with diethyl ether and filtered. The filtrate is evaporated to afford a yellow oil, which is separated by column chromatography (1:1 ethyl acetate-hexane) to afford the product, 3-[2-(4-amino-phenyl)-pyrimidin-4-yl]-benzonitrile (76 mg, 56%). 1H NMR (300 MHz, CDCl3): δ 8.75 (1H, d, J=6 Hz), 8.49 (1H, t, J=2 Hz), 8.37-8.31 (3H, m), 7.75 (1H, dt, J=8, 2 Hz), 7.59 (1H, t, J=8 Hz), 7.40 (1H, d, J=6 Hz), 6.76 (2H, d, J=9 Hz), 4.03 (2H, br s). 13C NMR (CDCl3): δ 164.6, 160.8, 158.0, 149.2, 138.2, 133.6, 131.0, 130.7, 129.8 (2C), 129.5, 127.2, 118.5, 114.5 (2C), 113.0, 112.9. MS (ES+): m/e 274 (20), 273 (100).

المصدر