反应详情

温度

120 °C

Under a dry argon atmosphere were combined 6-bromo-8-cyclopentyl-2-methanesulfinyl-8H-pyrido[2,3-d]pyrimidin-7-one (0.78 g, 2.19 mmol, prepared as in Example 107 of WO 98/33798 (incorporated herein by reference)) and 4-(6-amino-pyridin-3-yl)-piperazine-1-carboxylic acid tert-butyl ester (0.67 g, 2.4 mmol) without solvent. The flask was evacuated and heated to 120° C. for 1 hour. The mixture was purified by chromatography on silica gel, eluting with chloroform, to give a yellow foam, 0.288 g. Recrystalization from acetonitrile gave 4-[6-(6-bromo-8-cyclopentyl-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino)-pyridin-3-yl]-piperazine-1-carboxylic acid tert-butyl ester (0.266 g, 21%). MS (APCI); M++1: Calc'd, 570.17, Found, 570.0.

1. custom0.78 g, 2.19 mmol, prepared as in Example 107 of WO 98/33798 (
2. customThe flask was evacuated
3. customThe mixture was purified by chromatography on silica gel
4. washeluting with chloroform
5. customto give a yellow foam, 0.288 g
6. customRecrystalization from acetonitrile