반응 #4162

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N-[2-(5-chloro-1-indolinyl)phenyl]-4-methyl-1-piperazinecarboxamide

1,2-dichloroethane

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product

수율 29.5%

4-Chloro-6-(4-methyl-1-piperazinyl)-1,2-dihydrobenzo[b]pyrrolo[3,2,1-jk][1,4]benzodiazepine

수율 29.5%

용매

dichloromethane

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후처리

1. 1
   온도The solution was cooled
2. 2
   기타The layers were separated
3. 3
   세척The organic layer was washed with 2 l of 2N sodium hydroxide
4. 4
   건조with brine (500 ml), and dried over anhydrous magnesium sulfate
5. 5
   기타Removal of the solvent at reduced pressure
6. 6
   기타gave an oil
7. 7
   기타The oil was purified by flash chromatography on a silica gel column (1 kg, 230-400 mesh)
8. 8
   세척eluted initially with dichloromethane

실험 절차

To N-[2-(5-chloro-1-indolinyl)phenyl]-4-methyl-1-piperazinecarboxamide (13.5 g, 36.5 mmoles) was added a solution of polyphosphoric acid ethyl ester and 1,2-dichloroethane (250 ml). The solution was heated at 75° C. for 4 hours with exclusion of moisture. The solution was cooled and poured into a mixture of ice-sodium hydroxide solution (2 l) and dichloromethane (1.2 l). The mixture was stirred for 15 minutes. The layers were separated. The organic layer was washed with 2 l of 2N sodium hydroxide, then with brine (500 ml), and dried over anhydrous magnesium sulfate. Removal of the solvent at reduced pressure gave an oil. The oil was purified by flash chromatography on a silica gel column (1 kg, 230-400 mesh), packed and eluted initially with dichloromethane, then with dichloromethane containing an increasing methanol content in 1% increments to a final content of 5% (total 8 l). Concentration of the 5% methanol/dichloromethane eluent gave 3.8 g (28%) of product. Recrystallization from 2-propanol (50 ml) gave the analytical sample, mp 182°-183° C.

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