Phenol → 4,4-Dimethylchroman

HRID 1493771

반응식

HRID 1493771 반응식
[C:1]1([OH:7])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.P([O-])([O-])(O[CH2:11][C:12](C1C=CC=CC=1)([C:16]1C=CC=CC=1)[C:13](C)=[CH2:14])=O>C(=S)=S>[CH3:11][C:12]1([CH3:16])[C:6]2[C:1](=[CH:2][CH:3]=[CH:4][CH:5]=2)[O:7][CH2:14][CH2:13]1

참가 물질

4

반응물 2

HCID 996PhenolHCID 131715882Diphenyl-3-methyl-3-buten-1-yl phosphate2회

생성물 1

HCID 3167634,4-Dimethylchroman

시약·촉매·용매 1

HCID 6348Carbon Disulfide용매

반응 조건

온도
0 °C

실험 절차

To a dry, ice-cooled flask containing 34.95 g (0.134 mol) of stannic chloride was added quickly under argon 63.0 g (0.669 mol) of phenol. The mixture was stirred at 0 degrees C. for 0.5 hour and then treated with 43.0 g (0.135 mol) of diphenyl-3-methyl-3-buten-1-yl phosphate (Compound 75), followed by a 5 ml carbon disulfide rinse. The mixture was stirred at room temperature for 21 hours and then quenched by pouring onto 700 g ice and 1 liter of 1.5N NaOH. The mixture was extracted with 1×600 ml and 2×300 ml ether. The combined ether fractions were washed with 2N NaOH, saturated NaCl and dried (MgSO4) Solvent was removed in vacuo and the residue purified by flash chromatography (silica; 2% ether in hexane) to give the title compound as a colorless oil. PMR (CDCl3) &: 1.34 (6H), 1.80-1.85 (2H, m)m 4.15-4.20 (2H, m), 6.80 (1H, dd, J~8.1 hz, 1.5 Hz), 6.87 (1H, td, J~8.1 Hz, 1.5 Hz), 7.07 (1H, td, J~8.1 Hz, 1.5 Hz), 7.26 (1H, dd, J~8.1 Hz, 1.5 H).

후처리

  1. temperatureTo a dry, ice-cooled flask
  2. washrinse
  3. stirringThe mixture was stirred at room temperature for 21 hours
  4. customquenched
  5. additionby pouring onto 700 g ice and 1 liter of 1.5N NaOH
  6. extractionThe mixture was extracted with 1×600 ml and 2×300 ml ether
  7. washThe combined ether fractions were washed with 2N NaOH, saturated NaCl
  8. dry with materialdried (MgSO4) Solvent
  9. customwas removed in vacuo
  10. customthe residue purified by flash chromatography (silica; 2% ether in hexane)

출처 및 근거

ORD 기록
ord-a2805722fe8840eeaff53d9b6dba1167
출처 데이터셋
uspto-grants-1991_06
특허 번호
US05023341

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