Methanol → 7-(3-Methoxy-5-oxocyclopent-1-EN-1-YL)heptanoic acid

HRID 225351

反応式

HRID 225351 の反応式
Br[CH:2]1[CH2:6][C:5](=[O:7])[C:4]([CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][C:14]([OH:16])=[O:15])=[CH:3]1.N1C(C)=CC=CC=1C.[CH3:25][OH:26]>[B-](F)(F)(F)F.[Ag+]>[CH3:25][O:26][CH:2]1[CH2:6][C:5](=[O:7])[C:4]([CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][C:14]([OH:16])=[O:15])=[CH:3]1

参加物

5

反応物 3

HCID 887Methanol2 回HCID 79372,6-LutidineHCID 130462774-Bromo-2-(6-carboxyhexyl)cyclopent-2-en-1-one

生成物 1

HCID 233300047-(3-Methoxy-5-oxocyclopent-1-EN-1-YL)heptanoic acid

試薬・触媒・溶媒 1

HCID 159722Silver tetrafluoroborate触媒

実験手順

To a stirred solution of 5.30 g. of crude 4-bromo-2-(6-carboxyhexyl)cyclopent-2-en-1-one (Example 8) in 85ml. of methanol at 0°-3° C. is added 4.40 g. (22.6 mmole) of silver fluoborate in one portion. After 2 minutes, the mixture is treated with 2.66 g. (24.8 l mmoles) of 2,6-lutidine. After stirring for 30 minutes at 0°-3° C. the mixture is stirred at ambient temperature for 45 minutes. Silver bromide is removed by filtration, and the filtrate is concentrated to a volume of 40 ml. The solution is treated with saturated sodium chloride solution and extracted with ether. The extract is washed successively with 0.5 N hydrochloric acid solution, water, and saturated sodium chloride solution; dried over magnesium sulfate; and concentrated. Partition chromatography of the residue on Celite gives an oil, λmax.MeOH =220 mμ (7450); νmax.=1715 (carbonyl groups) and 1095 cm-1 (methoxy group).

後処理

  1. additionthe mixture is treated with 2.66 g
  2. stirringis stirred at ambient temperature for 45 minutes
  3. customSilver bromide is removed by filtration
  4. concentrationthe filtrate is concentrated to a volume of 40 ml
  5. additionThe solution is treated with saturated sodium chloride solution
  6. extractionextracted with ether
  7. washThe extract is washed successively with 0.5 N hydrochloric acid solution, water, and saturated sodium chloride solution
  8. dry with materialdried over magnesium sulfate
  9. concentrationand concentrated
  10. customPartition chromatography of the residue on Celite
  11. customgives an oil, λmax

出典と根拠

ORDレコード
ord-9964a853461340b797a30370fb59136b
出典データセット
uspto-grants-1980_11
特許番号
US04236027

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