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Acetic Acid → (2S,3R)-3-(acetyloxy)-5-[4-(6-methoxypyridin-3-yl)phenyl]-2-[2-(4-oxo-1,2,3-benzotriazin-3(4H)-yl)ethyl]pentanoic acid

HRID 1892149
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HRID 1892149 반응식
N(C(OC(C)C)=O)=NC([O:5][CH:6](C)[CH3:7])=O.[OH:15][C@H:16]([CH2:34][CH2:35][C:36]1[CH:41]=[CH:40][C:39]([C:42]2[CH:43]=[N:44][C:45]([O:48][CH3:49])=[CH:46][CH:47]=2)=[CH:38][CH:37]=1)[C@H:17]([CH2:21][CH2:22][N:23]1[C:28](=[O:29])[C:27]2[CH:30]=[CH:31][CH:32]=[CH:33][C:26]=2[N:25]=[N:24]1)[C:18]([OH:20])=[O:19].C(P(CCCC)CCCC)CCC.C(O)(=O)C>O1CCCC1>[C:6]([O:15][C@H:16]([CH2:34][CH2:35][C:36]1[CH:37]=[CH:38][C:39]([C:42]2[CH:43]=[N:44][C:45]([O:48][CH3:49])=[CH:46][CH:47]=2)=[CH:40][CH:41]=1)[C@H:17]([CH2:21][CH2:22][N:23]1[C:28](=[O:29])[C:27]2[CH:30]=[CH:31][CH:32]=[CH:33][C:26]=2[N:25]=[N:24]1)[C:18]([OH:20])=[O:19])(=[O:5])[CH3:7]
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참가 물질

6

반응물 4

HCID 176Acetic AcidHCID 13831TributylphosphineHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 66671252(2S,3R)-3-hydroxy-5-[4-(6-methoxypyridin-3-yl)phenyl]-2-[2-(4-oxo-1,2,3-benzotriazin-3(4H)-yl)ethyl]pentanoic acid

생성물 1

HCID 67182848(2S,3R)-3-(acetyloxy)-5-[4-(6-methoxypyridin-3-yl)phenyl]-2-[2-(4-oxo-1,2,3-benzotriazin-3(4H)-yl)ethyl]pentanoic acid
수율 73.5%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

실험 절차

Diisopropyl azodicarboxylate (63 mg) was added to a solution of compound (100 mg) obtained from Example 1A above, tri-n-butylphosphine (93 mg) and acetic acid (1 ml) in dry tetrahydrofuran (3 ml) at 0° C. Reaction mixture was stirred for 1 hour and concentrated. Residue was taken in ethyl acetate and washed with water and brine. Organic layer was concentrated to get oily residue which was purified on preparative thin layer chromatography (2 mm thickness) using 10% methanol in dichloromethane to get the title compound (80 mg) (formed probably by esterfication of acetic acid (used in large excess) and not due to Mitsunobu reaction). Mass (m/z): 517.06 (M++1); 1HNMR: δ 8.37 (m, 2H), 8.15 (d, 1H, J=8 Hz), 7.97-7.93 (m, 1H), 7.82-7.80 (m, 1H), 7.41 (d, 2H, J=8 Hz), 7.20 (d, 2H, J=8 Hz), 6.83 (d, 1H, J=8 Hz), 5.28-5.27 (m, 1H), 4.56-4.58 (m, 2H), 4.01 (s, 3H), 2.85-2.80 (m, 1H), 2.55-2.75 (m, 2H), 2.31-2.29 (m, 2H), 2.25-2.10 (m, 2H), 2.063 (s, 3H).

후처리

  1. customReaction mixture
  2. concentrationconcentrated
  3. washwashed with water and brine
  4. concentrationOrganic layer was concentrated
  5. customto get oily residue which
  6. customwas purified on preparative thin layer chromatography (2 mm thickness)

출처 및 근거

ORD 기록
ord-0b043cdab42a4525b118db922e74bdf8
출처 데이터셋
uspto-grants-2013_08
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08507670B2

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