Tetrabutylammonium Fluoride → 2-(2-Benzyloxycarbonylamino-ethyl)-4-hydroxy-pyrrolidine-1-carboxylic acid tert-butyl ester

HRID 1965153노트

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HRID 1965153 반응식
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH:11]([O:13][Si](C(C)(C)C)(C)C)[CH2:10][CH:9]1[CH2:21][CH2:22][NH:23][C:24]([O:26][CH2:27][C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)=[O:25])=[O:7])([CH3:4])([CH3:3])[CH3:2].CCCC[N+](CCCC)(CCCC)CCCC.[F-]>C1COCC1.CCOC(C)=O>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH:11]([OH:13])[CH2:10][CH:9]1[CH2:21][CH2:22][NH:23][C:24]([O:26][CH2:27][C:28]1[CH:29]=[CH:30][CH:31]=[CH:32][CH:33]=1)=[O:25])=[O:7])([CH3:4])([CH3:2])[CH3:3]

참가 물질

5

반응물 2

HCID 2724141Tetrabutylammonium FluorideHCID 675061522-(2-Benzyloxycarbonylamino-ethyl)-4-(tert-butyl-dimethyl-silanyloxy)-pyrrolidine-1-carboxylic acid tert-butyl ester

생성물 1

HCID 675057182-(2-Benzyloxycarbonylamino-ethyl)-4-hydroxy-pyrrolidine-1-carboxylic acid tert-butyl ester수율 91%

시약·촉매·용매 2

HCID 8028Tetrahydrofuran용매HCID 8857Ethyl Acetate용매

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온도
0 °C

실험 절차

A solution containing 4 (5.9 g, 12.5 mmol) in anhydrous THF (100 mL) was cooled to 0° C. TBAF (1M/THF, 14 mL, 14.0 mmol) was added in one portion. After 5 h, the reaction mixture was diluted with EtOAc and washed successively with 1M HCl and brine, dried over anhydrous Na2SO4, filtered, and concentrated. The crude product was purified by flash silica gel chromatography (1:1 to 1:3 hexanes/EtOAc) to afford 4.1 g (91%) of 5. 1H NMR (CDCl3, 300 MHz): δ7.31 (m, 5H), 5.93 (m, 1H), 5.07 (m, 2H), 4.37 (m, 1H), 4.03 (m, 1H) 3.51-3.06 (m, 4H), 2.05 (m, 1H), 1.77 (m, 1H), 1.44 (s, 9H) ppm. Mass spectrum, m/z [365.2] (M+H)+.

후처리

  1. washwashed successively with 1M HCl and brine
  2. dry with materialdried over anhydrous Na2SO4
  3. filtrationfiltered
  4. concentrationconcentrated
  5. customThe crude product was purified by flash silica gel chromatography (1:1 to 1:3 hexanes/EtOAc)

출처 및 근거

ORD 기록
ord-bfd391395e604ea4b58c95a895187d15
출처 데이터셋
uspto-grants-2013_04
특허 번호
US08415486B2

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