反应详情

温度

120 °C

A suspension of 6-bromo-N-(5-cyano-4-((2-methoxyethyl)amino)pyridin-2-yl)-7-(dimethoxymethyl)-3,4-dihydro-1,8-naphthyridine-1(2H)-carboxamide (intermediate 315, 290 mg, 0.574 mmol), 1-methylpyrazolboronicacid pinacol ester (190 mg, 0.886 mmol), PdCl2(dppf) (43 mg, 59 μmol) and saturated aqueous Na2CO3 (0.7 ml) in DME (2.1 ml) was sealed in a vial and purged with argon. The reaction mixture was stirred at 120° C. for 20 min in a microwave. The suspension was diluted with DCM and water, phases were separated and the aqueous layer was extracted with DCM (2×). The combined organic layers were dried using Na2SO4, filtered and evaporated. The crude product was purified by silica gel column chromatography eluting with a gradient of MeOH (1-10%) in DCM, followed by another purification eluting with a gradient of MeOH (1-5%) in DCM. Product containing fractions were combined, evaporated and dried to yield the title compound as an orange resin. (UPLC-MS 3) tR 0.95 min; ESI-MS 507.2 [M+H]+.

1. customwas sealed in a vial and
2. custompurged with argon
3. additionThe suspension was diluted with DCM and water, phases
4. customwere separated
5. extractionthe aqueous layer was extracted with DCM (2×)
6. customThe combined organic layers were dried
7. filtrationfiltered
8. customevaporated
9. customThe crude product was purified by silica gel column chromatography
10. washeluting with a gradient of MeOH (1-10%) in DCM
11. customfollowed by another purification
12. washeluting with a gradient of MeOH (1-5%) in DCM
13. additionProduct containing fractions
14. customevaporated
15. customdried