反应详情

EtMgBr (3 M, 2.0 eq, 6.5 mL) was added to a solution of N-methoxy-N-methyl-1H-indazole-5-carboxamide (2 g, 1.0 eq) in dry THF at 0° C. Once addition was complete, the mixture was stirred for 2 h, and extracted by EtOAc. The extract was dried, concentrated, and purified by column chromatography with petroleum ether:EtOAc=1:1 to give the desired product (1.8 g, 95%). 1H NMR (400 MHz, CDCl3) δ 11.20 (s, 1H), 8.45 (s, 1H), 8.22 (s, 1H), 8.06 (d, J=8.0 Hz, 1H), 7.27 (d, J=8.0 Hz, 1H), 3.08 (q, J=7.6 Hz, 2H), 1.28 (t, J=7.6 Hz, 3H).

1. additionOnce addition
2. extractionextracted by EtOAc
3. customThe extract was dried
4. concentrationconcentrated
5. custompurified by column chromatography with petroleum ether