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

HRID 457907노트

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HRID 457907 반응식
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]

참가 물질

7

반응물 4

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

생성물 1

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

시약·촉매·용매 2

HCID 8028Tetrahydrofuran용매2회HCID 8857Ethyl Acetate용매

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온도
0 °C

실험 절차

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 (2S)-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.

후처리

  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

출처 및 근거

ORD 기록
ord-932ddb79035e4cdfa8c492c9c8def126
출처 데이터셋
uspto-grants-2007_03
특허 번호
US07189754B2

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