Methanol → L-Proline, 1-[(2S)-2-[[(1,1-dimethylethoxy)carbonyl]amino]-1-oxo-8-nonen-1-yl]-4-hydroxy-, (4R)-

HRID 17810ノート

反応式

HRID 17810 の反応式
C[O:2][C:3]([C@@H:5]1[CH2:9][C@@H:8]([OH:10])[CH2:7][N:6]1[C:11](=[O:28])[C@@H:12]([NH:20][C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH:18]=[CH2:19])=[O:4].CO.O.[OH-].[Li+]>C1COCC1>[C:24]([O:23][C:21]([NH:20][C@@H:12]([CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH:18]=[CH2:19])[C:11]([N:6]1[CH2:7][C@H:8]([OH:10])[CH2:9][C@H:5]1[C:3]([OH:4])=[O:2])=[O:28])=[O:22])([CH3:27])([CH3:26])[CH3:25]

参加物

6

反応物 4

HCID 887MethanolHCID 962WaterHCID 3939Lithium HydroxideHCID 587986201-(2(S)-tert-Butoxycarbonylamino-non-8-enoyl)-4(R)-hydroxy-pyrrolidine-2(S)-carboxylic acid methyl ester

生成物 1

HCID 20765202L-Proline, 1-[(2S)-2-[[(1,1-dimethylethoxy)carbonyl]amino]-1-oxo-8-nonen-1-yl]-4-hydroxy-, (4R)-収率 96.1%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

1-(2(S)-tert-Butoxycarbonylamino-non-8-enoyl)-4(R)-hydroxy-pyrrolidine-2(S)-carboxylic acid methyl ester (4.7 g, 11.8 mmol) was dissolved in THF (80 mL), methanol (20 mL), and water (40 mL). Powdered lithium hydroxide (5.6 g, 233 mmol) was added. The light yellow slurry was stirred at rt under N2 for 16 h, and then concentrated in vacuo. The residue was partioned between ether and water. The ether phase was discarded, and the aqueous phase was treated with 1N HCl until the pH was 4. This acidic solution was extracted with EtOAc (3×). The combined EtOAc extracts were dried (MgSO4) and concentrated in vacuo to give 4.36 g (96%) of 1-(2(S)-tert-butoxycarbonylamino-8-nonenoyl)-4(R)-hydroxy-pyrrolidine-2(S)-carboxylic acid as a white solid. This acid was then dissolved in 150 mL of DMF and (1R,2S)-1-amino-2-vinylcyclopropane carboxylic acid ethyl ester hydrochloride (2.61 g, 13.6 mmol), N-methyl morpholine (2.5 mL, 22.6 mmol), and HATU (5.2 g, 13.7 mmol) was added. The reaction mixture was stirred at rt under N2 for 16 h, and then concentrated in vacuo. The residue was partitioned between ethyl acetate and pH 4 buffer (biphthalate). The organic phase was washed with sat. aq. NaHCO3, dried (MgSO4), and concentrated in vacuo to give the crude product. Flash chromatography (60%-80% ethyl acetate/hexane) gave 6.0 g (98%) of 1-{[1-(2(S)-tert-Butoxycarbonylamino-non-8-enoyl)-4(R)-hydroxy-pyrrolidine-2(S)carbonyl]-(1R)-amino}-2(S)-vinyl-cyclopropanecarboxylic acid ethyl ester as a white solid: 1H NMR (500 MHz, CD3OD) δ 1.25 (t, J=7.2 Hz, 3H), 1.33-1.80 (m, 10H), 1.46 (s, 9 H), 2.09 (m, 3H), 2.25 (m, 2H), 3.76 (m, 2H), 4.14 (m, 2H), 4.27 (dd, J=8.5, 5.2 Hz, 1H), 4.50 (m, 2H), 4.94 (d, J=10.1 Hz, 1H), 5.01 (dd, J=17.1, 1.8 Hz, 1H), 5.11 (dd, J=10.4, 1.8 Hz, 1H), 5.30 (d, J=15.6 Hz, 1H), 5.80 (m, 2H), 8.57 (s, 1H); MS m/z 522 (M++1).

後処理

  1. concentrationconcentrated in vacuo
  2. additionthe aqueous phase was treated with 1N HCl until the pH was 4
  3. extractionThis acidic solution was extracted with EtOAc (3×)
  4. dry with materialThe combined EtOAc extracts were dried (MgSO4)
  5. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-4e0b917b163843e0b1c48e0c8fa75703
出典データセット
uspto-grants-2010_06
特許番号
US07741281B2

反応ノート

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