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Methyl iodide → (2S,4R)-2-methyl 1-(2-(trimethylsilyl)ethyl) 4-methoxy-4-(2'-vinylbiphenyl-4-yl)pyrrolidine-1,2-dicarboxylate

HRID 1043412
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HRID 1043412 반응식
[H-].[Na+].[OH:3][C@:4]1([C:22]2[CH:27]=[CH:26][C:25]([C:28]3[CH:33]=[CH:32][CH:31]=[CH:30][C:29]=3[CH:34]=[CH2:35])=[CH:24][CH:23]=2)[CH2:8][N:7]([C:9]([O:11][CH2:12][CH2:13][Si:14]([CH3:17])([CH3:16])[CH3:15])=[O:10])[C@H:6]([C:18]([O:20][CH3:21])=[O:19])[CH2:5]1.[CH3:36]I>CN(C=O)C>[CH3:36][O:3][C@:4]1([C:22]2[CH:23]=[CH:24][C:25]([C:28]3[CH:33]=[CH:32][CH:31]=[CH:30][C:29]=3[CH:34]=[CH2:35])=[CH:26][CH:27]=2)[CH2:8][N:7]([C:9]([O:11][CH2:12][CH2:13][Si:14]([CH3:17])([CH3:16])[CH3:15])=[O:10])[C@H:6]([C:18]([O:20][CH3:21])=[O:19])[CH2:5]1
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HCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 59266527(2S,4R)-2-methyl 1-(2-(trimethylsilyl)ethyl) 4-hydroxy-4-(2'-vinylbiphenyl-4-yl)pyrrolidine-1,2-dicarboxylate

생성물 1

HCID 59266517(2S,4R)-2-methyl 1-(2-(trimethylsilyl)ethyl) 4-methoxy-4-(2'-vinylbiphenyl-4-yl)pyrrolidine-1,2-dicarboxylate수율 31.1%

시약·촉매·용매 1

HCID 6228
Dimethylformamide
용매

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온도
0 °C

실험 절차

Sodium hydride (60% in oil) (0.08 g, 1.925 mmol) was added to a solution of (2S,4R)-2-methyl 1-(2-(trimethylsilyl)ethyl) 4-hydroxy-4-(2′-vinylbiphenyl-4-yl)pyrrolidine-1,2-dicarboxylate (0.5 g, 1.069 mmol) and methyl iodide (0.12 mL, 1.925 mmol) at 0° C. in DMF. This was stirred at 0° C. for 3 hrs. The reaction was then quenched with a saturated NH4Cl solution and ether. The ether layer was washed with brine, dried over MgSO4, filtered and evaporated to give crude material. The crude material was purified by flash chromatography on the Biotage (20-40% EtOAc in hexanes) to give (2S,4R)-2-methyl 1-(2-(trimethylsilyl)ethyl) 4-methoxy-4-(2′-vinylbiphenyl-4-yl)pyrrolidine-1,2-dicarboxylate (160 mg, 31% yield) as a clear oil. LCMS: rt=2.11 min. [M+Na]+=504; Phenomenex-Luna C-18 (5μ) (3.0×50 mm); Solvent A=10% acetonitrile—90% water—0.1% TFA, Solvent B=90% acetonitrile—10% water—0.1% TFA; gradient 0% to 100% solvent B over 2 min. and then hold for 1 min.; 4 mL/min; inj. vol.=5 uL; wavelength=220. 1H NMR (500 MHz, CHLOROFORM-d) δ ppm −0.04-0.13 (m, 9H) 0.95-1.02 (m, 1H) 1.03-1.08 (m, 1H) 2.55 (dd, J=13.12, 8.85 Hz, 1H) 2.76-2.89 (m, 1H) 3.00 (s, 3H) 3.68-3.77 (m, 1H) 3.78 (s, 3H) 3.96-4.09 (m, 1H) 4.20-4.31 (m, 2H) 4.64 (dd, J=8.70, 1.98 Hz, 1H) 5.22 (d, J=11.90 Hz, 1H) 5.72 (d, J=17.40 Hz, 1H) 6.69 (ddd, J=17.40, 10.99, 2.44 Hz, 1H) 7.29 (d, J=7.32 Hz, 1H) 7.32-7.45 (m, 6H) 7.66 (d, J=7.32 Hz, 1H).

후처리

  1. customThe reaction was then quenched with a saturated NH4Cl solution and ether
  2. washThe ether layer was washed with brine
  3. dry with materialdried over MgSO4
  4. filtrationfiltered
  5. customevaporated
  6. customto give crude material
  7. customThe crude material was purified by flash chromatography on the Biotage (20-40% EtOAc in hexanes)

출처 및 근거

ORD 기록
ord-f2788f085a3844d1a387c13897fbe087
출처 데이터셋
uspto-grants-2013_10
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08563505B2

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