반응 #3290

반응 방정식

6-(2,6-dichlorophenyl)-2-methanesulfonyl-8-methyl-8H-pyrido[2,3-d]pyrimidin-7-one

6-(2,6-Dichlorophenyl)-2-methanesulfonyl-8-methyl-8H-pyrido[2,3-d]pyrimidin-7-one

4-chloroaniline

→

2-(4-Chlorophenylamino)-6-(2,6-dichlorophenyl)-8-methyl-8H-pyrido[2,3-d]pyrimidin-7-one

용매

Ethyl acetate

—

Petroleum ether

반응 조건

후처리

1. 1
   온도was heated
2. 2
   기타precipitation of a dark solid
3. 3
   여과This was filtered
4. 4
   세척washed with 50% hexane-ethyl acetate
5. 5
   기타The crude solid was purified
6. 6
   기타to remove dark colors by silica gel chromatography
7. 7
   세척eluting with chloroform
8. 8
   기타50% hexane-ethyl acetate to obtain pure crystalline product

실험 절차

A mixture of 0.113 g (0.29 mmol) of 6-(2,6-dichlorophenyl)-2-methanesulfonyl-8-methyl-8H-pyrido[2,3-d]pyrimidin-7-one of Example 39 in 0.50 g (3.90 mmol) of 4-chloroaniline was heated, with stirring, at the boiling point (238° C.) for 5 minutes. Ethyl acetate (3 mL) was added to the cooled dark blue reaction solution. Petroleum ether (3 mL) was added to completed precipitation of a dark solid. This was filtered and washed with 50% hexane-ethyl acetate; wt 0.078 g. The crude solid was purified to remove dark colors by silica gel chromatography, eluting with chloroform and then 50% hexane-ethyl acetate to obtain pure crystalline product; wt 0.056 g; mp 255°-256° C.

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