Tetrahydrofuran → 5-(2-Methyl-1,3-dioxolan-2-yl)-2-pentanone

HRID 972222ノート

反応式

HRID 972222 の反応式
[Li].[CH3:2][C:3]1([CH2:8][CH2:9][CH2:10][C:11]([OH:13])=O)[O:7][CH2:6][CH2:5][O:4]1.O1CCC[CH2:15]1.C[Li]>C(OCC)C>[CH3:2][C:3]1([CH2:8][CH2:9][CH2:10][C:11](=[O:13])[CH3:15])[O:4][CH2:5][CH2:6][O:7]1

参加物

6

反応物 4

HCID 8028TetrahydrofuranHCID 3028194LithiumHCID 13551185HCID 13551185、化合物HCID 178418348HCID 178418348、化合物

生成物 1

HCID 104196285-(2-Methyl-1,3-dioxolan-2-yl)-2-pentanone

試薬・触媒・溶媒 1

HCID 3283Diethyl Ether溶媒

反応条件

温度
0 °C

実験手順

348 Mg. of the lithium salt of the ketal acid, 4-(2-methyl-1,3-dioxolan-2-yl)butanoic acid was dissolved in 5 ml. anhydrous tetrahydrofuran. The solution was cooled to 0° C and 1.25 ml. of a 1.6 molar solution of methyllithium in diethylether was added dropwise over a period of one hour while stirring under a nitrogen atmosphere. The solution was allowed to rise approximately to 20° C and kept at this temperature over a period of two hours. The reaction mixture was added to crushed ice and the organic solvents were removed in vacuo. The residue was extracted with ether, the extract was washed with a saturated sodium chloride solution, dried with magnesium sulfate, filtered and evaporated in vacuo to give crude 5-(2-methyl-1,3-dioxolan-2-yl)-2-pentanone.

後処理

  1. customto rise approximately to 20° C
  2. additionThe reaction mixture was added
  3. customto crushed ice
  4. customthe organic solvents were removed in vacuo
  5. extractionThe residue was extracted with ether
  6. washthe extract was washed with a saturated sodium chloride solution
  7. dry with materialdried with magnesium sulfate
  8. filtrationfiltered
  9. customevaporated in vacuo

出典と根拠

ORDレコード
ord-f1f584607a964a5388071f1aa251ec0c
出典データセット
uspto-grants-1977_10
特許番号
US04052413

反応ノート

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