Trifluoroacetic acid → (3aR,5R,6aR)-Methyl 2-benzyl-5-((tert-butoxycarbonyl)amino)octahydro-cyclopenta[c]pyrrole-3a-carboxylate

HRID 571350ノート

反応式

HRID 571350 の反応式
[CH3:1][O:2][C:3]([C:5]1[CH2:9][C@H:8]([NH:10][C:11]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])[CH2:7][CH:6]=1)=[O:4].CO[CH2:20][N:21]([CH2:27][C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)[CH2:22][Si](C)(C)C.C(O)(C(F)(F)F)=O>C(Cl)Cl>[CH2:27]([N:21]1[CH2:22][C@@:5]2([C:3]([O:2][CH3:1])=[O:4])[CH2:9][C@H:8]([NH:10][C:11]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])[CH2:7][C@H:6]2[CH2:20]1)[C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1

参加物

5

反応物 3

HCID 6422Trifluoroacetic acidHCID 353442Benzyl(methoxymethyl)((trimethylsilyl)methyl)amineHCID 10586185methyl (4R)-4-{[(tert-butoxy)carbonyl]amino}cyclopent-1-ene-1-carboxylate

生成物 1

HCID 86708893(3aR,5R,6aR)-Methyl 2-benzyl-5-((tert-butoxycarbonyl)amino)octahydro-cyclopenta[c]pyrrole-3a-carboxylate

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒2 回

実験手順

To a solution of the product from Step B (5.51 g, 20 mmol) and N-(methoxymethyl)-N-(trimethylsilylmethyl)benzylamine (6.4 mL, 24 mmol, Aldrich) in DCM (40 mL) was added 1M TFA in DCM (2.4 mL, 2.4 mmol) slowly. The resulting mixture was stirred at rt overnight and quenched by the addition of saturated aqueous NaHCO3 solution. The organic phase was washed with brine, dried over Na2SO4. Evaporation and purification by column chromatography (eluent: 10% EtOAc in hexanes to 20%) gave the desired isomer as a colorless gel. 1H-NMR (400 MHz, CDCl3) of the desired isomer: δ 1.38 (s, 9H), 1.66-1.86 (m, 2H), 1.86-1.96 (m, 1H), 1.96-2.08 (m, 1H), 2.29-2.63 (m, 3H), 2.71-2.93 (m, 2H), 3.43-3.56 (m, 2H), 3.58-3.74 (s, 3H), 4.08-4.29 (m, 1H), 4.78 (d, J=6.6 Hz, 1H), 7.11-7.31 (m, 5H). LC/MS: C24H28N2O4: m/z 375.2 (M+H).

後処理

  1. customquenched by the addition of saturated aqueous NaHCO3 solution
  2. washThe organic phase was washed with brine
  3. dry with materialdried over Na2SO4
  4. customEvaporation and purification by column chromatography (eluent: 10% EtOAc in hexanes to 20%)
  5. customgave the desired isomer as a colorless gel

出典と根拠

ORDレコード
ord-d3fa2e254a6c46fe8a5b9f317cd57b4a
出典データセット
uspto-grants-2015_05
特許番号
US09024017B2

反応ノート

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