Ethylene Glycol → 3-Methoxy-8-(2-methyl-[1,3]-dioxolan-2-yl)-benzo[c]chromen-6-one

HRID 987591노트

반응식

HRID 987591 반응식
[C:1]([C:4]1[CH:5]=[CH:6][C:7]2[C:16]3[C:11](=[CH:12][C:13]([O:17][CH3:18])=[CH:14][CH:15]=3)[O:10][C:9](=[O:19])[C:8]=2[CH:20]=1)(=[O:3])[CH3:2].[CH2:21](O)[CH2:22][OH:23].C1(C)C=CC(S(O)(=O)=O)=CC=1>C1C=CC=CC=1>[CH3:18][O:17][C:13]1[CH:12]=[C:11]2[C:16]([C:7]3[CH:6]=[CH:5][C:4]([C:1]4([CH3:2])[O:23][CH2:22][CH2:21][O:3]4)=[CH:20][C:8]=3[C:9](=[O:19])[O:10]2)=[CH:15][CH:14]=1

참가 물질

5

반응물 3

HCID 174Ethylene GlycolHCID 6101p-Toluenesulfonic acidHCID 103332378-Acetyl-3-methoxy-benzo[c]chromen-6-one

생성물 1

HCID 113244043-Methoxy-8-(2-methyl-[1,3]-dioxolan-2-yl)-benzo[c]chromen-6-one수율 60.7%

시약·촉매·용매 1

HCID 241Benzene용매

실험 절차

The compound from Step E (5.2 g, 19 mmol), ethylene glycol (4.4 g, 71 mmol) and a catalytic amount of p-toluenesulfonic acid (0.2 g) were dissolved in benzene (300 mL) and refluxed for 28 h. The solvent was removed and the crude product chromatographed on silica gel with hexane/ethyl acetate (2:1) to yield 3.6 g (60%) of the title compound. 1H-NMR (400 MHz, CDCl3) δH 1.75 (3H, s, CH3), 3.82 (2H, t, OCH2), 3.91 (3H, s, OCH3), 4.10 (2H, t, OCH2), 6.93 (1H, s, ArH), 6.98 (1H, d, ArH), 7.47 (3H, m, ArH), 8.04 (1H, s, ArH).

후처리

  1. temperaturerefluxed for 28 h
  2. customThe solvent was removed
  3. customthe crude product chromatographed on silica gel with hexane/ethyl acetate (2:1)

출처 및 근거

ORD 기록
ord-f55f89b8a0c14e0092ec97927e0a6b0e
출처 데이터셋
uspto-grants-2003_10
특허 번호
US06632835B2

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