Triethylamine → (S)-1-Phenylethyl(R)-2-(4-hydroxy-4-phenylpiperidin-1-yl)-2-phenylacetate

HRID 1027808

반응식

HRID 1027808 반응식
Br[CH:2]([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)[C:3]([O:5][C@H:6]([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[CH3:7])=[O:4].C(N(CC)CC)C.[C:27]1([C:33]2([OH:39])[CH2:38][CH2:37][NH:36][CH2:35][CH2:34]2)[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1>C1COCC1.[I-].C([N+](CCCC)(CCCC)CCCC)CCC.C(OCC)(=O)C>[C:14]1([C@@H:2]([N:36]2[CH2:37][CH2:38][CH2:33][CH2:34][CH2:35]2)[C:3]([OH:5])=[O:4])[CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=1.[OH:39][C:33]1([C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[CH2:38][CH2:37][N:36]([C@H:2]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[C:3]([O:5][C@H:6]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[CH3:7])=[O:4])[CH2:35][CH2:34]1

참가 물질

8

반응물 3

HCID 8471TriethylamineHCID 963874-Phenylpiperidin-4-olHCID 59166394(S)-1-Phenylethyl 2-bromo-2-phenylacetate

생성물 2

HCID 1090523(R)-2-phenyl-2-(piperidin-1-yl)acetic acidHCID 59166502(S)-1-Phenylethyl(R)-2-(4-hydroxy-4-phenylpiperidin-1-yl)-2-phenylacetate수율 54.7%

시약·촉매·용매 3

HCID 67553Tetrabutylammonium Iodide촉매HCID 8028Tetrahydrofuran용매2회HCID 8857Ethyl Acetate용매

실험 절차

To a solution of (S)-1-phenylethyl 2-bromo-2-phenylacetate (1.50 g, 4.70 mmol) in THF (25 mL) was added triethylamine (1.31 mL, 9.42 mmol), followed by tetrabutylammonium iodide (0.347 g, 0.94 mmol). The reaction mixture was stirred at room temperature for 5 minutes and then a solution of 4-phenyl-4-hydroxypiperidine (1.00 g, 5.64 mmol) in THF (5 mL) was added. The mixture was stirred for 16 hours and then it was diluted with ethyl acetate (100 mL), washed (H2O×2, brine), dried (MgSO4), filtered and concentrated. The residue was purified on a silica gel column (0-60% ethyl acetate-hexane) to provide an approximately 2:1 mixture of diastereomers, as judged by 1H NMR. Separation of these isomers was performed using supercritical fluid chromatography (CHIRALCEL® OJ-H, 30×250 mm; 20% ethanol in CO2 at 35° C.), to give first the (R)-isomer of the title compound (0.534 g, 27%) as a yellow oil and then the corresponding (S)-isomer (0.271 g, 14%), also as a yellow oil. (S,R)-isomer: 1H NMR (400 MHz, CD3OD) δ 7.55-7.47 (m, 4H), 7.44-7.25 (m, 10H), 7.25-7.17 (m, 1H), 5.88 (q, J=6.6 Hz, 1H), 4.12 (s, 1H), 2.82-2.72 (m, 1H), 2.64 (dt, J=11.1, 2.5 Hz, 1H), 2.58-2.52 (m, 1H), 2.40 (dt, J=11.1, 2.5 Hz, 1H), 2.20 (dt, J=12.1, 4.6 Hz, 1H), 2.10 (dt, J=12.1, 4.6 Hz, 1H), 1.72-1.57 (m, 2H), 1.53 (d, J=6.5 Hz, 3H). LC-MS: Anal. Calcd. for C27H29NO3: 415; found: 416 (M+H)+; (S,S)-isomer: H1NMR (400 MHz, CD3OD) δ 7.55-7.48 (m, 2H), 7.45-7.39 (m, 2H), 7.38-7.30 (m, 5H), 7.25-7.13 (m, 4H), 7.08-7.00 (m, 2H), 5.88 (q, J=6.6 Hz, 1H), 4.12 (s, 1H), 2.95-2.85 (m, 1H), 2.68 (dt, J=11.1, 2.5 Hz, 1H), 2.57-2.52 (m, 1H), 2.42 (dt, J=11.1, 2.5 Hz, 1H), 2.25 (dt, J=12.1, 4.6 Hz, 1H), 2.12 (dt, J=12.1, 4.6 Hz, 1H), 1.73 (dd, J=13.6, 3.0 Hz, 1H), 1.64 (dd, J=13.6, 3.0 Hz, 1H), 1.40 (d, J=6.6 Hz, 3H). LC-MS: Anal. Calcd. for C22H29NO3: 415; found: 416 (M+H)+.

후처리

  1. stirringThe mixture was stirred for 16 hours
  2. washwashed (H2O×2, brine)
  3. dry with materialdried (MgSO4)
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe residue was purified on a silica gel column (0-60% ethyl acetate-hexane)
  7. customto provide
  8. additionan approximately 2:1 mixture of diastereomers
  9. customSeparation of these isomers
  10. customfluid chromatography (CHIRALCEL® OJ-H, 30×250 mm; 20% ethanol in CO2 at 35° C.)

출처 및 근거

ORD 기록
ord-a84098fcb63340c49755873256199946
출처 데이터셋
uspto-grants-2014_05
특허 번호
US08735398B2

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