Methyl iodide → HCID 69732452, 화합물

HRID 2180600노트

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HRID 2180600 반응식
[Br:1][C:2]1[C:11]2[C:10]([CH3:13])([CH3:12])[CH2:9][CH:8]=[C:7]([CH:14]([CH3:16])[CH3:15])[C:6]=2[CH:5]=[C:4]([C:17](=[O:19])C)[C:3]=1[O:20][CH2:21][CH3:22].C([N-][CH:27]([CH3:29])[CH3:28])(C)C.[Li+].CI>C1COCC1>[Br:1][C:2]1[C:11]2[C:10]([CH3:13])([CH3:12])[CH2:9][CH:8]=[C:7]([CH:14]([CH3:16])[CH3:15])[C:6]=2[CH:5]=[C:4]([C:17](=[O:19])[CH:27]([CH3:28])[CH3:29])[C:3]=1[O:20][CH2:21][CH3:22]

참가 물질

5

반응물 3

HCID 6328Methyl iodideHCID 2724682Lithium diisopropylamideHCID 22490930HCID 22490930, 화합물

생성물 1

HCID 69732452HCID 69732452, 화합물

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

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온도
-78 °C

실험 절차

To a solution of 1-(4-bromo-3-ethoxy-8-isopropyl-5,5-dimethyl-5,6-dihydro-naphthalen-2-yl)-ethanone (Compound A-109, 512 mg, 1.4 mmol) in THF (10 mL) at −78° C. was added lithium diisopropylamide (1.5 M in cyclohexane, 2.0 mL, 3.0 mmol). The cold bath was removed and the mixture was stirred for 3 h. The mixture was cooled to −78° C. again and methyl iodide (0.52 mL, 8.34 mmol) was added. The mixture was stirred at room temperature for 16 h then quenched with ammonium chloride (sat), extracted with diethyl ether. The combined ethereal layers were washed with water, brine, dried (Na2SO4), filtered and concentrated in vacuo. The crude residue was purified by flash chromatography (silica gel, 2% ethyl acetate in hexanes) followed by HPLC (Waters-Nova Pak column, 2% ethyl acetate in hexanes) to give the title compound.

후처리

  1. customThe cold bath was removed
  2. stirringThe mixture was stirred at room temperature for 16 h
  3. customthen quenched with ammonium chloride (sat)
  4. extractionextracted with diethyl ether
  5. washThe combined ethereal layers were washed with water, brine
  6. dry with materialdried (Na2SO4)
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo
  9. customThe crude residue was purified by flash chromatography (silica gel, 2% ethyl acetate in hexanes)

출처 및 근거

ORD 기록
ord-ac0d837ba6d14f3d99b19f3f64226412
출처 데이터셋
uspto-grants-2005_05
특허 번호
US06887896B1

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