(S)-2-((S)-1-tert-butoxycarbonyl-ethylamino)-3-(2',5'-dichloro-biphenyl-4-yl)-propionic acid benzyl ester → (S)-2-((S)-1-tert-butoxycarbonyl-ethylamino)-3-(2',5'-dichloro-biphenyl-4-yl)-propionic acid

HRID 238915노트

반응식

HRID 238915 반응식
C([O:8][C:9](=[O:36])[C@@H:10]([NH:26][C@H:27]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[CH3:28])[CH2:11][C:12]1[CH:17]=[CH:16][C:15]([C:18]2[CH:23]=[C:22]([Cl:24])[CH:21]=[CH:20][C:19]=2[Cl:25])=[CH:14][CH:13]=1)C1C=CC=CC=1>CCOC(C)=O.CO.[Pd]>[C:32]([O:31][C:29]([C@@H:27]([NH:26][C@@H:10]([CH2:11][C:12]1[CH:13]=[CH:14][C:15]([C:18]2[CH:23]=[C:22]([Cl:24])[CH:21]=[CH:20][C:19]=2[Cl:25])=[CH:16][CH:17]=1)[C:9]([OH:36])=[O:8])[CH3:28])=[O:30])([CH3:33])([CH3:34])[CH3:35]

참가 물질

5

반응물 1

HCID 58280524(S)-2-((S)-1-tert-butoxycarbonyl-ethylamino)-3-(2',5'-dichloro-biphenyl-4-yl)-propionic acid benzyl ester

생성물 1

HCID 58280551(S)-2-((S)-1-tert-butoxycarbonyl-ethylamino)-3-(2',5'-dichloro-biphenyl-4-yl)-propionic acid수율 90.8%

시약·촉매·용매 3

HCID 23938Palladium촉매HCID 887Methanol용매HCID 8857Ethyl Acetate용매

실험 절차

Step 4′: A suspension of (S)-2-((S)-1-tert-Butoxycarbonyl-ethylamino)-3-(2′,5′-dichloro-biphenyl-4-yl)-propionic acid benzyl ester (580 mg, 1.10 mmol) and 5% Pd on carbon (0.146 g) in EtOAc (10 mL) was treated with H2 (balloon) and stirred at rt for 1.5 hour. The resulted precipitate was dissolved in methanol and filtered through celite pad. The filtrate was concentrated under reduced pressure and the obtained residue was re-crystallized from EtOAc to give (S)-2-((S)-1-tert-butoxycarbonyl-ethylamino)-3-(2′,5′-dichloro-biphenyl-4-yl)-propionic acid (438 mg). 1H NMR (400 MHz, DMSO-d6) δ 1.12 (d, 3H, J=7.1 Hz), 1.35 (s, 9H), 2.84 (dd, 2H, J=7.3, 13.6 Hz), 2.95 (dd, 2H, J=6.1, 13.6 Hz), 3.20 (dd, 1H, J=6.8, 13.6 Hz), 3.48 (dd, 1H, J=6.1, 7.3 Hz), 7.33 (d, 2H, J=8.6 Hz), 7.37 (d, 2H, J=8.3 Hz), 7.42-7.49 (m, 2H), 7.60 (d, 2H, J=8.6 Hz); MS: m/z (MH+) 438.

후처리

  1. additionwas treated with H2 (balloon)
  2. filtrationfiltered through celite pad
  3. concentrationThe filtrate was concentrated under reduced pressure
  4. customthe obtained residue was re-crystallized from EtOAc

출처 및 근거

ORD 기록
ord-f709c6f1191e47b8990798be515769ed
출처 데이터셋
uspto-grants-2014_02
특허 번호
US08642635B2

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