Triphenylphosphine → (S)-3-{(S)-2-[3-(3,4-Dichloro-benzyloxy)-phenyl]-2,3-dihydro-benzo[1,4]dioxin-6-yl}-2-[(4-nitro-benzenesulfonyl)-((S)-1-phenyl-propyl)-amino]-propionic acid methyl ester

HRID 391829Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 391829
[CH3:1][O:2][C:3](=[O:45])[C@@H:4]([NH:32][S:33]([C:36]1[CH:41]=[CH:40][C:39]([N+:42]([O-:44])=[O:43])=[CH:38][CH:37]=1)(=[O:35])=[O:34])[CH2:5][C:6]1[CH:31]=[CH:30][C:9]2[O:10][C@@H:11]([C:14]3[CH:19]=[CH:18][CH:17]=[C:16]([O:20][CH2:21][C:22]4[CH:27]=[CH:26][C:25]([Cl:28])=[C:24]([Cl:29])[CH:23]=4)[CH:15]=3)[CH2:12][O:13][C:8]=2[CH:7]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[C:65]1([C@H:71](O)[CH2:72][CH3:73])[CH:70]=[CH:69][CH:68]=[CH:67][CH:66]=1.CC(OC(/N=N/C(OC(C)C)=O)=O)C>C1COCC1>[CH3:1][O:2][C:3](=[O:45])[C@@H:4]([N:32]([S:33]([C:36]1[CH:37]=[CH:38][C:39]([N+:42]([O-:44])=[O:43])=[CH:40][CH:41]=1)(=[O:35])=[O:34])[C@H:71]([C:65]1[CH:70]=[CH:69][CH:68]=[CH:67][CH:66]=1)[CH2:72][CH3:73])[CH2:5][C:6]1[CH:31]=[CH:30][C:9]2[O:10][C@@H:11]([C:14]3[CH:19]=[CH:18][CH:17]=[C:16]([O:20][CH2:21][C:22]4[CH:27]=[CH:26][C:25]([Cl:28])=[C:24]([Cl:29])[CH:23]=4)[CH:15]=3)[CH2:12][O:13][C:8]=2[CH:7]=1

Komponenten

6

Edukt 4

HCID 11776TriphenylphosphineHCID 640199(R)-(+)-1-Phenyl-1-propanolHCID 5363146Diisopropyl azodicarboxylateHCID 58327266(S)-3-{(S)-2-[3-(3,4-dichloro-benzyloxy)-phenyl]-2,3-dihydro-benzo[1,4]dioxin-6-yl}-2-(4-nitro-benzenesulfonylamino)-propionic acid methyl ester

Produkt 1

HCID 67248965(S)-3-{(S)-2-[3-(3,4-Dichloro-benzyloxy)-phenyl]-2,3-dihydro-benzo[1,4]dioxin-6-yl}-2-[(4-nitro-benzenesulfonyl)-((S)-1-phenyl-propyl)-amino]-propionic acid methyl esterAusbeute 96,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

(S)-3-{(S)-2-[3-(3,4-Dichloro-benzyloxy)-phenyl]-2,3-dihydro-benzo[1,4]dioxin-6-yl}-2-(4-nitro-benzenesulfonylamino)-propionic acid methyl ester (0.37 g) was dissolved in 2 mL dry THF and triphenylphosphine (0.29 g) and (R)-(+)-1-phenyl-1-propanol (0.15 g) were added. The mixture was stirred at 0° C. for 10 min, then DIAD 933 μL (0.22 g, 1.1 mmol) was added over 2 minutes. The reaction stirred at room temperature for 5 hours, then was evaporated. The residue was purified by silica gel flash chromatography (9:1 to 7:3 hexanes/EtOAc) to give (S)-3-{(S)-2-[3-(3,4-Dichloro-benzyloxy)-phenyl]-2,3-dihydro-benzo[1,4]dioxin-6-yl}-2-[(4-nitro-benzenesulfonyl)-((S)-1-phenyl-propyl)-amino]-propionic acid methyl ester (0.42 g). This material was dissolved in DMF (0.7 mL), and then mercapto acetic acid (0.15 g) and DBU (0.48 g) were added and stirred at room temperature for 2 hours. The reaction was quenched by addition of NaHCO3 solution (4 mL) and product was extracted with ether. The ether layer was washed with water and brine, and then dried (Na2SO4), filtered, and evaporated. The residue was purified by silica gel column (5% EtOAc in hexanes to 15% EtOAc in hexanes) to get pure (S)-3-{(S)-2-[3-(3,4-dichloro-benzyloxy)-phenyl]-2,3-dihydro-benzo[1,4]dioxin-6-yl}-2-((S)-1-phenyl-propylamino)-propionic acid methyl ester (0.2 g). LCMS (m/z): 607.

Aufarbeitung

  1. stirringThe reaction stirred at room temperature for 5 hours
  2. customwas evaporated
  3. customThe residue was purified by silica gel flash chromatography (9:1 to 7:3 hexanes/EtOAc)

Quellen und Nachweise

ORD-Eintrag
ord-48bae842a7ab454b99ba4dbe640671a0
Quelldatensatz
uspto-grants-2013_02
Patentnummer
US08383644B2

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