P-Cresol → 1-(4-Tolyloxy)-1,2-bis-(4-bromobenzoyl)ethylene

HRID 791

반응식

HRID 791 반응식
Br[CH:2]([C:14](=[O:22])[C:15]1[CH:20]=[CH:19][C:18]([Br:21])=[CH:17][CH:16]=1)[CH:3](Br)[C:4](=[O:12])[C:5]1[CH:10]=[CH:9][C:8]([Br:11])=[CH:7][CH:6]=1.[CH3:23][C:24]1[CH:30]=[CH:29][C:27]([O-:28])=[CH:26][CH:25]=1.[Na+].CC1C=CC(O)=CC=1>C1COCC1>[C:24]1([CH3:23])[CH:30]=[CH:29][C:27]([O:28][C:2]([C:14](=[O:22])[C:15]2[CH:20]=[CH:19][C:18]([Br:21])=[CH:17][CH:16]=2)=[CH:3][C:4](=[O:12])[C:5]2[CH:10]=[CH:9][C:8]([Br:11])=[CH:7][CH:6]=2)=[CH:26][CH:25]=1

참가 물질

5

반응물 3

HCID 2879P-CresolHCID 117313561,2-Dibromo-1,2-di(4-bromobenzoyl)ethaneHCID 23673456Sodium p-methylphenolate

생성물 1

HCID 539578091-(4-Tolyloxy)-1,2-bis-(4-bromobenzoyl)ethylene

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매2회

실험 절차

To a solution of 1,2-dibromo-1,2-di(4-bromobenzoyl) ethane (11.1 g, 0.02 mole) in 35 ml of THF was added a suspension of sodium 4-methyl phenoxide [prepared from 0.92 g (0.04 mole) Na and 4.32 g (0.04 mole) 4-methylphenol in 30 ml THF by refluxing for 4-5 hr]. The yellow mixture was refluxed for 2-3 hr (TLC followed) after which the THF was removed under reduced pressure. The residue was treated with water, and the solid was filtered, washed with water, dried (Na2SO4), and dissolved in chloroform. The chloroform solution was passed through a silica column (elution with 2-5% ether in hexane). The result was an off white crystalline solid, 4.95 g (50%), mp 137°-8° C. IR (KBr) 3087, 3035, 2868, 1687, 1646, 1587, 1572, 1557, 1502, 1399, 1364, 1194, 1068, 1009, 971, 876, 815, 772, 526. 1H NMR (CDCl3 /35° C.) 7.92 (d, 2H, J=8.8), 7.65 (d, 2H, J=8.8), 7.55 (d, 2H, J=8.8), 7.48 (d, 2H, J=8.8), 7.27 (d, 2H, J=8.3), 7.11 (d, 2H, J=8.3), 6.32 (s, 1H), 2.4 (s, 3H). 13C NMR (CDCl3 /35° C.) 189.4, 187.6, 168.4, 150.9, 136.6, 136.0, 133.4, 132.3, 131.8, 130.9, 130.3, 129.6, 129.2, 128.2, 120.6, 101.8, 20.95. MS m/e 500 (M+).

후처리

  1. customwas removed under reduced pressure
  2. additionThe residue was treated with water
  3. filtrationthe solid was filtered
  4. washwashed with water
  5. dry with materialdried (Na2SO4)
  6. dissolutiondissolved in chloroform
  7. washThe chloroform solution was passed through a silica column (elution with 2-5% ether in hexane)

출처 및 근거

ORD 기록
ord-523a53f4b10c44568fb08b813772adeb
출처 데이터셋
uspto-grants-1998_03
특허 번호
US05723288

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