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, 300 mg, 0.594 mmol), 2-methylthiazole-5-boronic acid pinacol ester (250 mg, 1.066 mmol), PdCl2(dppf) (43.4 mg, 59 μmol) and saturated aqueous Na2CO3 (0.7 ml) in DME (2.5 ml) was sealed in a vial and purged with argon. The reaction mixture was stirred at 120° C. for 20 min in a microwave. Additional methylthiazole-5-boronic acid pinacol ester (20 mg, x mmol), the reaction mixture was purged with argon and was stirred at 120° C. for 10 min in a microwave. The suspension was diluted with DCM and saturated aqueous Na2CO3, phases were separated and the aqueous layer was extracted with DCM. 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 EtOAc (70-100%) in hexanes. Product containing fractions were combined, evaporated and dried to yield the title compound as a colorless solid. (UPLC-MS 3) tR 1.09 min; ESI-MS 524.1 [M+H]+.

1. customwas sealed in a vial and
2. custompurged with argon
3. customAdditional methylthiazole-5-boronic acid pinacol ester (20 mg, x mmol), the reaction mixture was purged with argon
4. stirringwas stirred at 120° C. for 10 min in a microwave
5. additionThe suspension was diluted with DCM and saturated aqueous Na2CO3, phases
6. customwere separated
7. extractionthe aqueous layer was extracted with DCM
8. customThe combined organic layers were dried
9. filtrationfiltered
10. customevaporated
11. customThe crude product was purified by silica gel column chromatography
12. washeluting with a gradient of MeOH (1-10%) in DCM
13. customfollowed by another purification
14. washeluting with a gradient of EtOAc (70-100%) in hexanes
15. additionProduct containing fractions
16. customevaporated
17. customdried