반응 #92610

반응 방정식

5-amino-1-(2-bromo-5-nitrophenyl)-3-(4-phenoxyphenyl)-1H-pyrazole-4-carbonitrile

phosphorous acid

→

crude product

5-Amino-1-(2-bromo-5-nitrophenyl)-3-(4-phenoxyphenyl)-1H-pyrazole-4-carboxamide

반응 조건

후처리

1. 1
   기타was consumed
2. 2
   온도The reaction was cooled to room temperature
3. 3
   기타partitioned between water (40 mL) and EA (40 mL)
4. 4
   기타Organic layer was separated from aqueous layer
5. 5
   추출The aqueous phase was then extracted with EA (20 mL)
6. 6
   세척The combined organic layers were washed with brine (50 mL)
7. 7
   건조dried over Na2SO4
8. 8
   농축concentrated

실험 절차

A mixture of 5-amino-1-(2-bromo-5-nitrophenyl)-3-(4-phenoxyphenyl)-1H-pyrazole-4-carbonitrile (137 mg, 0.287 mmol) in phosphorous acid (85 wt. % in H2O, 10 mL) was stirred at 100° C. for 1 hr, until TLC and LCMS analysis showed that most of starting material was consumed. The reaction was cooled to room temperature and partitioned between water (40 mL) and EA (40 mL). Organic layer was separated from aqueous layer. The aqueous phase was then extracted with EA (20 mL). The combined organic layers were washed with brine (50 mL), dried over Na2SO4 and concentrated to get the crude product (149 mg) which was used in next step without further purification. MS (ESI) m/e [M+1]+494, 496.

출처