반응 #601541

반응 방정식

N-methoxy-N-methylacetamide

6-bromo-1H-indazole

n-BuLi

→

title compound 24-a

수율 9.1%

1-(1H-indazol-6-yl)ethanone

수율 9.1%

용매

THF

반응 조건

후처리

1. 1
   workup.STIRRINGThe reaction mixture was stirred for another 2 h at −65° C.
2. 2
   기타quenched with 40 mL H2O
3. 3
   추출The mixture was extracted with EtOAc (3×50 mL)
4. 4
   세척The combined organic layers were washed with 100 mL brine
5. 5
   기타dried
6. 6
   농축concentrated to dryness
7. 7
   기타The residue was purified by flash column chromatography (PE/EA=40/1)

실험 절차

To a solution of 6-bromo-1H-indazole (5.0 g, 25.4 mmol) in 40 mL THF was added dropwise n-BuLi (2.5M, 30 mL, 76.2 mmol) at −65° C., and the mixture was stirred for 2 h. Then, N-methoxy-N-methylacetamide (2.9 g, 27.9 mmol) was added. The reaction mixture was stirred for another 2 h at −65° C., then quenched with 40 mL H2O. The mixture was extracted with EtOAc (3×50 mL). The combined organic layers were washed with 100 mL brine, dried, and concentrated to dryness. The residue was purified by flash column chromatography (PE/EA=40/1) to give the title compound 24-a (370 mg, 9%) as a yellow solid. [M+H] Calc'd for C9H8N2O, 161. Found, 161.

출처