Sodium hydride → (S)-1-tert-Butyl 2-methyl 4-(cyanomethylene)pyrrolidine-1,2-dicarboxylate

HRID 1349000ノート

反応式

HRID 1349000 の反応式
CCOP(OCC)([CH2:6][C:7]#[N:8])=O.[H-].[Na+].O=[C:15]1[CH2:19][N:18]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[C@H:17]([C:27]([O:29][CH3:30])=[O:28])[CH2:16]1.[Cl-].[NH4+]>C1COCC1.C(OCC)(=O)C>[C:7]([CH:6]=[C:15]1[CH2:19][N:18]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[C@H:17]([C:27]([O:29][CH3:30])=[O:28])[CH2:16]1)#[N:8]

参加物

7

反応物 4

HCID 24758Sodium hydrideHCID 25517Ammonium ChlorideHCID 75676Diethyl (cyanomethyl)phosphonateHCID 109884851-tert-butyl 2-methyl (2S)-4-oxopyrrolidine-1,2-dicarboxylate

生成物 1

HCID 118308474(S)-1-tert-Butyl 2-methyl 4-(cyanomethylene)pyrrolidine-1,2-dicarboxylate収率 80%

試薬・触媒・溶媒 2

HCID 8028Tetrahydrofuran溶媒2 回HCID 8857Ethyl Acetate溶媒

反応条件

温度
0 °C

実験手順

Diethyl cyanomethyl phosphonate (0.86 ml, 4.4 mmol) was dissolved in dry THF (50 ml) and the solution cooled to 0° C. Sodium hydride (205 mg of a 60% suspension in parrafin oil, 5.1 mmol) was then added cautiously and the reaction stirred for 30 min. The reaction mixture was then cooled to −78° C. and a solution of 1-tert-butyl 2-methyl (25)-4-oxo-1,2-pyrrolidinedicarboxylate (1.0 g, 4.1 mmol) in dry THF (5 ml) was added dropwise. The reaction was then allowed to reach room temperature. Saturated aqueous ammonium chloride solution (15 ml) was then added, followed by ethyl acetate (100 ml). (The organic layer was removed, and the aqueous washed with ethyl acetate (3×5 ml). The combined organic layers were dried with brine and magnesium sulfate before filtering and removal of solvent. Silica gel chromatography, eluting with 35% ethyl acetate in hexanes gave the desired compound (860 mg, 80%) as an off-white wax.

後処理

  1. temperatureThe reaction mixture was then cooled to −78° C.
  2. customto reach room temperature
  3. custom(The organic layer was removed
  4. washthe aqueous washed with ethyl acetate (3×5 ml)
  5. dry with materialThe combined organic layers were dried with brine and magnesium sulfate
  6. filtrationbefore filtering
  7. customremoval of solvent
  8. washSilica gel chromatography, eluting with 35% ethyl acetate in hexanes

出典と根拠

ORDレコード
ord-63bb1422f00e4f28b2ff731379e5f105
出典データセット
uspto-grants-2007_05
特許番号
US07211601B2

反応ノート

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