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Sodium Bicarbonate → Methyl 3-{[(2R,6R)-1-benzyl-2,6-dimethylpiperidin-4-yl]amino}-5-fluoro-2-methylbenzoate

HRID 2208677
ノート
印刷プレビュー

反応式

HRID 2208677 の反応式
[NH2:1][C:2]1[C:3]([CH3:13])=[C:4]([CH:9]=[C:10]([F:12])[CH:11]=1)[C:5]([O:7][CH3:8])=[O:6].[CH2:14]([N:21]1[C@@H:26]([CH3:27])[CH2:25][C:24](=O)[CH2:23][C@H:22]1[CH3:29])[C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C([O-])(O)=O.[Na+]>C1COCC1.C(O)(C(F)(F)F)=O>[CH2:14]([N:21]1[C@H:26]([CH3:27])[CH2:25][CH:24]([NH:1][C:2]2[C:3]([CH3:13])=[C:4]([CH:9]=[C:10]([F:12])[CH:11]=2)[C:5]([O:7][CH3:8])=[O:6])[CH2:23][C@H:22]1[CH3:29])[C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

7

反応物 4

HCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 53419617Methyl 3-amino-5-fluoro-2-methylbenzoateHCID 59342390(2R,6S)-1-benzyl-2,6-dimethylpiperidin-4-one

生成物 1

HCID 70873973Methyl 3-{[(2R,6R)-1-benzyl-2,6-dimethylpiperidin-4-yl]amino}-5-fluoro-2-methylbenzoate収率 30.3%

試薬・触媒・溶媒 2

HCID 6422Trifluoroacetic acid溶媒HCID 8028Tetrahydrofuran溶媒

反応条件

温度
60 °C

実験手順

To a stirred solution of methyl 3-amino-5-fluoro-2-methylbenzoate (520 mg, 2.84 mmol) in THF (20 mL) and TFA (813 uL) was added (2R,6S)-1-benzyl-2,6-dimethylpiperidin-4-one (679 mg, 3.12 mmol) at 0° C. The mixture was stirred at 60° C. for 1 hour under nitrogen atmosphere. Then the mixture was cooled to 0° C. in an ice bath, sodium triacetoxyborohydride (1.27 g, 5.68 mmol) was added. The reaction mixture was stirred at rt for 2 hours. Then aq. NaHCO3 was added at 0° C. until pH8-9, and the content was extracted with ethylacetate. The organic layer was dried over MgSO4 and filtered. The filtrate was concentrated in vacuo. The residue was purified by silica gel column chromatography (NH—SiO2; heptane/ethylacetate=5/1) to give titled compound as a colorless oil (331 mg, 30% yield.). 1H-NMR (400 MHz, CDCl3) δppm; 7.35-7.39 (m, 2H), 7.27-7.30 (m, 2H), 7.21-7.26 (m, 1H), 6.76 (dd, J=2.4, 9.2 Hz, 1H), 6.45 (dd, J=2.4, 11.2 Hz, 1H), 3.94 (d, J=14.4 Hz, 1H), 3.87 (s, 3H), 3.58-3.65 (m, 2H), 3.46 (d, J=14.4 Hz, 1H), 3.06-3.12 (m, 1H), 2.94-3.01 (m, 1H), 2.21 (s, 3H), 2.02-2.07 (m, 1H), 1.82-1.89 (m, 1H), 1.15-1.22 (m, 1H), 1.12 (d, J=6.0 Hz, 3H), 1.09 (d, J=7.2 Hz, 3H).

後処理

  1. temperatureThen the mixture was cooled to 0° C. in an ice bath
  2. stirringThe reaction mixture was stirred at rt for 2 hours
  3. extractionthe content was extracted with ethylacetate
  4. dry with materialThe organic layer was dried over MgSO4
  5. filtrationfiltered
  6. concentrationThe filtrate was concentrated in vacuo
  7. customThe residue was purified by silica gel column chromatography (NH—SiO2; heptane/ethylacetate=5/1)

出典と根拠

ORDレコード
ord-9628d1b858d04b85b588c1a98eefe12c
出典データセット
uspto-grants-2016_06
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09376422B2

反応ノート

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