Реакция #3547

Уравнение реакции

1-[2-Amino-6-(2,6-dichlorophenyl)-pyrido[2,3-d]pyrimidin-7-yl]-3-tert-butylurea

DMF dimethyl acetal

→

N'-[7-(3-tert-butylureido)-6-(2,6-dichlorophenyl)-pyrido[2,3-d]pyrimidin-2-yl]-N,N-dimethylformamidine

Условия реакции

Обработка

1. 1
   Другоеfollowed by purification on flash silica gel chromatography
2. 2
   Промывкаeluting sequentially with 100:0, 3:1, 1:1, and 0:100 dichloromethane
3. 3
   Другоеethyl acetate gave a solid
4. 4
   Другоеthat was triturated in 2-propanol

Методика

1-[2-Amino-6-(2,6-dichlorophenyl)-pyrido[2,3-d]pyrimidin-7-yl]-3-tert-butylurea from Example 3 was reacted with DMF dimethyl acetal for 13.5 hours as described in Example 78. Workup as described above, followed by purification on flash silica gel chromatography eluting sequentially with 100:0, 3:1, 1:1, and 0:100 dichloromethane:ethyl acetate gave a solid that was triturated in 2-propanol to afford the title compound N'-[7-(3-tert-butylureido)-6-(2,6-dichlorophenyl)-pyrido[2,3-d]pyrimidin-2-yl]-N,N-dimethylformamidine, mp 190°-193° C.

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