Dimethylformamide → HCID 178497461, 화합물

HRID 1861052노트

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HRID 1861052 반응식
I[C:2]1[C:10]2[C:5](=[CH:6][C:7]([C:11]3[CH:16]=[CH:15][C:14]([O:17][CH2:18][O:19][CH3:20])=[C:13]([O:21][CH3:22])[CH:12]=3)=[CH:8][CH:9]=2)[NH:4][N:3]=1.[Li]C1C=CC=CC=1.[Li]C(CC)C.CN([CH:38]=[O:39])C>C1COCC1>[CH3:22][O:21][C:13]1[CH:12]=[C:11]([C:7]2[CH:6]=[C:5]3[C:10]([C:2]([CH:38]=[O:39])=[N:3][NH:4]3)=[CH:9][CH:8]=2)[CH:16]=[CH:15][C:14]=1[O:17][CH2:18][O:19][CH3:20]

참가 물질

6

반응물 4

HCID 6228DimethylformamideHCID 178418400CID 53628100HCID 178497462HCID 178497462, 화합물HCID 178506676HCID 178506676, 화합물

생성물 1

HCID 178497461HCID 178497461, 화합물수율 71%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

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온도
-78 °C

실험 절차

In a 100-mL round-bottom flask, 3-iodo-6-(3-methoxy-4-methoxymethoxy-phenyl)-1H-indazole (921 mg, 2.245 mmol, 1.00 equiv) was dissolved in THF (36 mL) and cooled to −78° C. (allow 8 min at this scale). A solution of PhLi (2.5 mL, 1.8M, 4.49 mmol, 2.00 equiv) was added and the mixture was allowed to stir for 30 min. A solution of s-BuLi (3.63 mL, 4.71 mmol, 2.1 equiv) was added and the reaction mixture was allowed to stir for 1 h at −78° C. Neat DMF (1.4 mL, 18 mmol, 8.0 equiv) was added. The cold bath was removed and the reaction was allowed to slowly warm to 0° C. in the air. As the ice melted saturated sodium bicarbonate (20 mL) was added. The product was extracted into ethyl acetate (200 mL) from saturated sodium bicarbonate (75 mL more), dried over sodium sulfate, decanted and concentrated under reduced pressure. Purification by silica gel chromatography (450 mL silica, 4:6 ethyl acetate/hexane) gave 6-(3-methoxy-4-methoxymethoxy-phenyl)-1H-indazole-3-carbaldehyde (498 mg, 71%)): Rf sm 0.30, p 0.14 (ethyl acetate-hexane 4:6); 1H NMR (CDCl3) δ 10.85 (bs, 1H), 10.25 (s, 1H), 8.37 (d, 1H, J=8.4 Hz), 7.67 (s, 1H), 7.60 (d, 1H, J=8.4 Hz), 6.26 (d, 1H, J=8.7 Hz), 7.19 (m, 2H), 5.30 (s, 2H), 3.99 (s, 3H), 3.55 (s, 3H).

후처리

  1. stirringto stir for 1 h at −78° C
  2. customThe cold bath was removed
  3. temperatureto slowly warm to 0° C. in the air
  4. additionAs the ice melted saturated sodium bicarbonate (20 mL) was added
  5. extractionThe product was extracted into ethyl acetate (200 mL) from saturated sodium bicarbonate (75 mL more),
  6. dry with materialdried over sodium sulfate
  7. customdecanted
  8. concentrationconcentrated under reduced pressure
  9. customPurification by silica gel chromatography (450 mL silica, 4:6 ethyl acetate/hexane)

출처 및 근거

ORD 기록
ord-c9053958539a4a81821742dddb9a754b
출처 데이터셋
uspto-grants-2003_03
특허 번호
US06531491B1

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