tert-Butyl-(2S,3R)-3-{[tert-butyl(dimethyl)silyl]oxy}-2-formylpyrrolidine-1-carboxylate → (2R,3R)-3-(tert-Butyl-dimethylsilanyloxy)-2-[(1S)-(1-hydroxy-2-methylpropyl)]pyrrolidine-1-carboxylic acid tert-butyl ester

HRID 501628ノート

反応式

HRID 501628 の反応式
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][C@@H:10]([O:13][Si:14]([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:16])[CH3:15])[C@H:9]1[CH:21]=[O:22])=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH:23]([Mg]Cl)([CH3:25])[CH3:24]>C1COCC1>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][C@@H:10]([O:13][Si:14]([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:16])[CH3:15])[C@H:9]1[C@@H:21]([OH:22])[CH:23]([CH3:25])[CH3:24])=[O:7])([CH3:4])([CH3:3])[CH3:2]

参加物

4

反応物 2

HCID 16732142tert-Butyl-(2S,3R)-3-{[tert-butyl(dimethyl)silyl]oxy}-2-formylpyrrolidine-1-carboxylateHCID 178418918HCID 178418918、化合物

生成物 1

HCID 68459442(2R,3R)-3-(tert-Butyl-dimethylsilanyloxy)-2-[(1S)-(1-hydroxy-2-methylpropyl)]pyrrolidine-1-carboxylic acid tert-butyl ester収率 79.8%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

反応条件

温度
-60 °C

実験手順

To 51C (6.50 g, 19.8 mmol) in THF (100 mL) at −78° C. was added a 2M THF solution of isopropylmagnesium chloride (30.0 mL, 60.0 mmol) over 20 min. The cold bath was removed and the reaction was stirred for 1 h. The reaction was then cooled to −60° C. and was quenched with saturated aqueous ammonium chloride. After warming to rt, the whole was diluted with EtOAc. The layers were separated and the organic layer washed with water and brine, then dried (MgSO4), filtered and concentrated. The resulting residue was purified via flash chromatography eluting with 20% EtOAc/hexane to provide the title compound (5.90 g).

後処理

  1. customThe cold bath was removed
  2. customwas quenched with saturated aqueous ammonium chloride
  3. temperatureAfter warming to rt
  4. additionthe whole was diluted with EtOAc
  5. customThe layers were separated
  6. washthe organic layer washed with water and brine
  7. dry with materialdried (MgSO4)
  8. filtrationfiltered
  9. concentrationconcentrated
  10. customThe resulting residue was purified via flash chromatography
  11. washeluting with 20% EtOAc/hexane

出典と根拠

ORDレコード
ord-dd743f4e10864eb89f05085eabffc2f4
出典データセット
uspto-grants-2010_08
特許番号
US07772267B2

反応ノート

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