Methanol → 1,3-Propanedione, 1,3-bis(4-bromophenyl)-

HRID 495326

반응식

HRID 495326 반응식
C[C:2]1[CH:10]=[C:9]([Br:11])[CH:8]=[CH:7][C:3]=1[C:4]([OH:6])=O.[H-].[Na+].[CH3:14][C:15]([C:17]1[CH:22]=[CH:21][C:20]([Br:23])=[CH:19][CH:18]=1)=[O:16].CO>C1C=CC=CC=1>[Br:23][C:20]1[CH:21]=[CH:22][C:17]([C:15](=[O:16])[CH2:14][C:4](=[O:6])[C:3]2[CH:2]=[CH:10][C:9]([Br:11])=[CH:8][CH:7]=2)=[CH:18][CH:19]=1

참가 물질

6

반응물 4

HCID 887MethanolHCID 7466p-BromoacetophenoneHCID 24758Sodium hydrideHCID 995704-Bromo-2-methylbenzoic acid

생성물 1

HCID 1474381,3-Propanedione, 1,3-bis(4-bromophenyl)-

시약·촉매·용매 1

HCID 241Benzene용매2회

반응 조건

온도
60 °C

실험 절차

In a 1-liter three neck round bottom flask, 43 g (0.2 mol) methyl 4-bromobenzoic acid and 17.6 g (0.4 mol) sodium hydride were dissolved in 200 ml dried benzene and heated to 60° C. Next, 39.8 g (0.2 mol) 4-bromoacetophenone in 100 ml dry benzene was slowly added through a dropping funnel, and 1 ml methanol was added to the flask to initiate the reaction. After the mixture was refluxed overnight, the reaction was quenched by adding methanol and pouring it into ice water. The pH of the mixture was brought down to 7.0 using 5 N sulfuric acid. A solid was collected, washed with water, and recrystallized from benzene to give a light yellow product. Characterization. Yield: 30.3 g (40%). 1H NMR (300 MHz, CDCl3, 20° C., δ): 7.84 (d, 4H, ArH); 7.62 (d, 4H, ArH); 6.77 (s, 2H, CH2). EI-MS: 382(M+), 301, 225, 183, 157.

후처리

  1. customthe reaction
  2. temperatureAfter the mixture was refluxed overnight
  3. customthe reaction was quenched
  4. additionby adding methanol
  5. additionpouring it into ice water
  6. customA solid was collected
  7. washwashed with water
  8. customrecrystallized from benzene
  9. customto give a light yellow product

출처 및 근거

ORD 기록
ord-3d02933d858b48d495be87e41b75640f
출처 데이터셋
uspto-grants-2005_09
특허 번호
US06939625B2

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