3,5-Dimethoxybenzaldehyde → 4-(3,5-Dimethoxyphenyl)-3-butenoic acid

HRID 594786

반응식

HRID 594786 반응식
[Br-].[C:2]([CH2:5][CH2:6][P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)([OH:4])=[O:3].C[Si]([N-][Si](C)(C)C)(C)C.[Na+].[CH3:36][O:37][C:38]1[CH:39]=[C:40]([CH:43]=[C:44]([O:46][CH3:47])[CH:45]=1)[CH:41]=O>C1COCC1>[CH3:36][O:37][C:38]1[CH:39]=[C:40]([CH:41]=[CH:6][CH2:5][C:2]([OH:4])=[O:3])[CH:43]=[C:44]([O:46][CH3:47])[CH:45]=1

참가 물질

5

반응물 3

HCID 817473,5-DimethoxybenzaldehydeHCID 2724254Sodium bis(trimethylsilyl)amideHCID 2733850(2-Carboxyethyl)triphenylphosphonium bromide

생성물 1

HCID 851672434-(3,5-Dimethoxyphenyl)-3-butenoic acid수율 38.1%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

반응 조건

온도
-78 °C

실험 절차

To a solution of (2-carboxyethyl)triphenylphosphonium bromide (13.7 g, 33 mmol) in dry THF (50 mL) was added NaHMDS (33 mL, 66 mmol) dropwise at −20° C. under N2 and the reaction stirred for 20 min. The reaction was cooled to −78° C. and 3,5-dimethoxybenzaldehyde (5.0 g, 30 mmol) was added, and the reaction mixture stirred overnight while warming to rt. The reaction was quenched with water and extracted with EtOAc. The aqueous layer was acidified to pH=2 with dilute HCl solution and extracted with EtOAc again. The combined organic layers were washed with brine, dried (Na2SO4) and concentrated to give 2.54 g (38%) of the title compound as an orange gum. [M+H] Calc'd for C12H14O4, 223. Found, 223.

후처리

  1. stirringthe reaction mixture stirred overnight
  2. temperaturewhile warming to rt
  3. customThe reaction was quenched with water
  4. extractionextracted with EtOAc
  5. extractionextracted with EtOAc again
  6. washThe combined organic layers were washed with brine
  7. dry with materialdried (Na2SO4)
  8. concentrationconcentrated

출처 및 근거

ORD 기록
ord-7d5809919f2449e9b58f5810f1f4a2dc
출처 데이터셋
uspto-grants-2016_01
특허 번호
US09242968B2

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