Methyl iodide → 2-[3-(Tert-butyldimethylsilanyloxy)-4,4,4-trifluoro 1-methylbutyl]pyridine

HRID 2080581ノート

反応式

HRID 2080581 の反応式
[Si:1]([O:8][CH:9]([C:18]([F:21])([F:20])[F:19])[CH2:10][CH2:11][C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][N:13]=1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[Li+].[CH3:23]C([N-]C(C)C)C.CI>C1COCC1>[Si:1]([O:8][CH:9]([C:18]([F:19])([F:21])[F:20])[CH2:10][CH:11]([C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][N:13]=1)[CH3:23])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2]

参加物

5

反応物 3

HCID 6328Methyl iodideHCID 2724682Lithium diisopropylamideHCID 223986342-[3-(Tert-butyldimethylsilanyloxy)-4,4,4-trifluorobutyl]pyridine

生成物 1

HCID 223986112-[3-(Tert-butyldimethylsilanyloxy)-4,4,4-trifluoro 1-methylbutyl]pyridine収率 89%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

反応条件

温度
-75 °C

実験手順

A solution of 810 mg (2.54 mmol) of 2-[3-(tert-butyldimethylsilanyloxy)-4,4,4-trifluorobutyl]pyridine in 8 mL of THF was treated with 2.54 mL (3.81 mmol, 1.5 eq.) of LDA (1.5 M solution in cyclohexane) at −75° C. After stirring at −75° C. for 45 minutes, 474 μL (7.61 mmol, 3.0 eq.) of methyl iodide was added at −75° C. The resulting mixture was stirred at this temperature for 10 minutes and quenched with saturated NH4Cl solution. The product was extracted into ether. The ethereal layer was washed with water, brine, dried over magnesium sulfate, filtered, and concentrated in vacuo to give 750 mg (89%) of 2-[3-(tert-butyldimethylsilanyloxy)-4,4,4-trifluoro-1-methylbutyl]pyridine (a mixture of two diastereomers) as a brown oil.

後処理

  1. stirringThe resulting mixture was stirred at this temperature for 10 minutes
  2. customquenched with saturated NH4Cl solution
  3. extractionThe product was extracted into ether
  4. washThe ethereal layer was washed with water, brine
  5. dry with materialdried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-e8c421ce13664e85963e8640f7102bb3
出典データセット
uspto-grants-2011_04
特許番号
US07932392B2

反応ノート

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