反应详情

A mixture of 2-amino-5-isopropyl-3,7-dihydro-pyrrolo[2,3-d]pyrimidin-4-one and acetic anhydride (20 mL) was heated to reflux for 3 h and evaporated. The residue was treated with BnNEt3Cl (8.99 g, 40 mmol), PhNMe2 (4.9 mL) and POCl3 (17 mL, 120 mmol) in CH3CN (100 mL) at 100° C. for 40 min and concentrated. The residue was poured into ice water and neutralized with 2N NaOH, extracted with EtOAc (80 mL×3), and evaporated to give an oil which was digested with methanolic 4N HCl (50 mL) at 50° C. for 2 h. After cooling, and neutralization to pH 7 with 2N NaOH, the solid was collected by filtration and dried to give 4-chloro-5-isopropyl-7H-pyrrolo[2,3-d]pyrimidin-2-ylamine (1.88 g, 45%). HPLC Rt: 5.796 min. 1H-NMR (DMSO-d6): δ 11.170 (s, 1H), 6.82 (s, 1H), 6.42 (s, 2H), 3.24 (7, 1H), 1.25 (s, 3H), 1.23 (s, 3H).

1. temperaturewas heated
2. temperatureto reflux for 3 h
3. customevaporated
4. concentrationconcentrated
5. additionThe residue was poured into ice water and neutralized with 2N NaOH
6. extractionextracted with EtOAc (80 mL×3)
7. customevaporated
8. customto give an oil which
9. temperatureAfter cooling
10. filtrationneutralization to pH 7 with 2N NaOH, the solid was collected by filtration
11. customdried