Dimethylformamide → HCID 20768134, 화합물

HRID 985036노트

반응식

HRID 985036 반응식
[OH:1][C:2]1[CH:7]=[CH:6][C:5]([S:8][C:9]2[CH:14]=[CH:13][C:12]([OH:15])=[C:11]([CH3:16])[CH:10]=2)=[CH:4][C:3]=1[CH3:17].C([O-])([O-])=O.[Cs+].[Cs+].CN(C=O)C.Br[CH2:30][C:31]([O:33][C:34]([CH3:37])([CH3:36])[CH3:35])=[O:32]>O>[C:34]([O:33][C:31](=[O:32])[CH2:30][O:1][C:2]1[CH:7]=[CH:6][C:5]([S:8][C:9]2[CH:14]=[CH:13][C:12]([OH:15])=[C:11]([CH3:16])[CH:10]=2)=[CH:4][C:3]=1[CH3:17])([CH3:37])([CH3:36])[CH3:35]

참가 물질

6

반응물 4

HCID 6228DimethylformamideHCID 10796Cesium carbonateHCID 79177tert-Butyl bromoacetateHCID 618879Bis(4-hydroxy-3-methylphenyl) Sulfide

생성물 1

HCID 20768134HCID 20768134, 화합물

시약·촉매·용매 1

HCID 962Water용매

실험 절차

An oven-dried 100 mL round-bottomed flask was charged with bis-(4-hydroxy-3-methylphenyl)-sulfide (8.6 g, 34.9 mmol), finely powdered Cs2CO3 (11.9 g, 36.7 mmol), and anhydrous DMF (35 mL). Next, tert-butyl bromoacetate (5.2 mL, 34.9 mmol, Aldrich) was added dropwise, and the reaction was stirred vigorously overnight at room temperature. The reaction was poured into 500 mL of water and extracted with 3×50 mL of methylene chloride. The combined organics were washed with 2×150 mL of water, dried over Na2SO4, and concentrated to a slightly yellow oil. The mixture was then purified by flash chromatography (SiO2 gel 60, eluted with 10% hexanes in DCM—5% hexanes in DCM—100% DCM). The fractions containing only desired product 1.1 were combined and concentrated to a white solid (3.5 g). The mixed fractions were combined, concentrated, and resubjected to the same chromatography conditions to yield an additional 2.0 g of pure 1.1. 1H NMR (400 MHz) (CDCl3) δ 7.13 (2H, m); 7.06 (2H, m); 6.70 (1H, d, J=8.3 Hz); 6.59 (1H, d, J=8.4 Hz); 4.50 (2H, s); 2.23 (3H, s); 2.20 (3H, s); 1.48 (9H, s).

후처리

  1. extractionextracted with 3×50 mL of methylene chloride
  2. washThe combined organics were washed with 2×150 mL of water
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated to a slightly yellow oil
  5. customThe mixture was then purified by flash chromatography (SiO2 gel 60, eluted with 10% hexanes in DCM—5% hexanes in DCM—100% DCM)
  6. additionThe fractions containing only desired product 1.1
  7. concentrationconcentrated to a white solid (3.5 g)
  8. concentrationconcentrated
  9. customto yield an additional 2.0 g of pure 1.1

출처 및 근거

ORD 기록
ord-11fadcaef7e24419a02330e257caeb34
출처 데이터셋
uspto-grants-2005_03
특허 번호
US06869975B2

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