Methyl iodide → N-((1R)-1-(Methoxymethyl)-3-methylbutyl)-3,4-dimethylbenzamide

HRID 339361

반응식

HRID 339361 반응식
[OH:1][CH2:2][C@H:3]([NH:8][C:9](=[O:18])[C:10]1[CH:15]=[CH:14][C:13]([CH3:16])=[C:12]([CH3:17])[CH:11]=1)[CH2:4][CH:5]([CH3:7])[CH3:6].[OH-].[Na+].I[CH3:22]>CN(C=O)C>[CH3:22][O:1][CH2:2][C@H:3]([NH:8][C:9](=[O:18])[C:10]1[CH:15]=[CH:14][C:13]([CH3:16])=[C:12]([CH3:17])[CH:11]=1)[CH2:4][CH:5]([CH3:7])[CH3:6]

참가 물질

5

반응물 3

HCID 6328Methyl iodideHCID 14798Sodium HydroxideHCID 39352414(R)-N-(1-hydroxy-4-methylpentan-2-yl)-3,4-dimethylbenzamide

생성물 1

HCID 57527964N-((1R)-1-(Methoxymethyl)-3-methylbutyl)-3,4-dimethylbenzamide수율 73.1%

시약·촉매·용매 1

HCID 6228Dimethylformamide용매2회

반응 조건

온도
0 °C

실험 절차

To a solution of (R)—N-(1-hydroxy-4-methylpentan-2-yl)-3,4-dimethylbenzamide (1.59 g, 6.39 mmol) (example 71a) in dry DMF (20 mL) was added powdered NaOH (281 mg, 7 mmol) an the solution was stirred at 0° C. for 2 hrs. Iodomethane (1 eq, 6.39 mmol) was added in DMF (10 ml) drop-wise over period of 1 hr. The temperature was kept at 0° C. and the mixture was stirred for 1 hr. The reaction was quenched by adding 300 ml of water. The aqueous layer was extracted with dichloromethane, dried over MgSO4 and evaporated. The residue was purified by flash chromatography on silica-gel (toluene-ethyl acetate; 5-20% gradient) to give 1.23 g (R)—N-(1-methoxy-4-methylpentan-2-yl)-3,4-dimethylbenzamide (73%). 1H NMR (500 MHz, CDCl3): δ 0.94-0.97 (t, 6H), 1.41-1.47 (M, 1H), 1.54-1.60 (m, 1H), 1.64-1.68 (m, 1H), 2.29 (d, 6H), 3.36 (s, 3H), 3.45-3.50 (m, 2H), 4.34-4.39 (m, 1H), 6.23-6.25 (d, 1H), 7.16-7.17 (d, 1H), 7.47-7.49 (dd, 1H), 7.56 (s, 1H). MS (M+H, 264.3)

후처리

  1. customwas kept at 0° C.
  2. stirringthe mixture was stirred for 1 hr
  3. customThe reaction was quenched
  4. additionby adding 300 ml of water
  5. extractionThe aqueous layer was extracted with dichloromethane
  6. dry with materialdried over MgSO4
  7. customevaporated
  8. customThe residue was purified by flash chromatography on silica-gel (toluene-ethyl acetate; 5-20% gradient)

출처 및 근거

ORD 기록
ord-f79309d3f0de4500876070ea3271a2b9
출처 데이터셋
uspto-grants-2014_11
특허 번호
US08895050B2

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